Tag: People Also Ask

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Post-Cholecystectomy Diarrhoea (UK): Is It Bile Acid Diarrhoea and What Should You Do?

Bile Acid Diarrhoea After Gallbladder Removal (UK): Symptoms, SeHCAT Test, and What Helps

Author context: I lost 6 stone on GLP-1 (Mounjaro) and had emergency NHS gallbladder surgery in February 2026. During recovery, I learned fast that “digestive upset” after cholecystectomy can be more than just bland food and time.

Medical note: This is lived experience + education, not medical advice. If you have severe pain, fever, jaundice, or persistent vomiting, seek urgent medical care.

Short answer: Some people develop ongoing loose stools after gallbladder removal because bile flows more continuously into the bowel. If excess bile acids reach the colon, they can pull water into the gut and trigger watery diarrhoea and urgency. This is often called bile acid diarrhoea (BAD) or bile acid malabsorption (BAM). It’s uncomfortable — but importantly, it’s treatable.

If you’re thinking “is this normal, or is something wrong?” this guide will help you spot patterns, know what to ask for, and what support options are reasonable while you wait for help.

Start here first: Low-fat diet after gallbladder removal (UK) →

What is bile acid diarrhoea (BAD)?

Bile acid diarrhoea happens when too much bile acid reaches the large intestine (colon). Bile acids are essential for fat digestion, but in the colon they can irritate the lining and cause watery diarrhoea, urgency and cramping.

You might also see it called:

  • bile acid malabsorption (BAM)
  • bile salt diarrhoea

After gallbladder removal, bile doesn’t “store and squirt” anymore — it tends to flow more continuously. For many people that’s fine. For some, it becomes an ongoing trigger.

Is diarrhoea after gallbladder removal common?

It can be. The reported rate of post-cholecystectomy diarrhoea varies a lot between studies (partly because not everyone is investigated), but research reviews have reported a wide range. One audit paper noted post-cholecystectomy diarrhoea has been reported anywhere from 2.1% to 57.2%, and not all of that is necessarily bile acid diarrhoea.

For readers who want the source (useful for trust and for talking to a clinician):

Symptoms: what BAD feels like (and how it differs from “normal recovery”)

Everyone’s recovery is different. But BAD often has a recognisable pattern:

  • Watery diarrhoea (often sudden)
  • Urgency (that “I need a toilet now” feeling)
  • Cramping that improves after a bowel movement
  • Symptoms worse after fatty foods
  • Sometimes yellow or pale stool (not always)

Short-term looseness right after surgery can happen for other reasons (medications, diet change, stress, antibiotics). BAD is more likely when symptoms are persistent or follow a “fat-trigger → urgency” pattern.

Table: Is this likely bile acid diarrhoea?

Pattern More like normal adjustment More like bile acid diarrhoea
Timing First few days only Persists weeks/months
Triggers Random, inconsistent Worse after fatty meals
Stool Soft/loose sometimes Watery + urgency
Impact Annoying but manageable Affects daily life / confidence

How is BAD diagnosed in the UK?

In the UK, a common test is a SeHCAT scan, which assesses bile acid absorption. It involves swallowing a small capsule and attending appointments a week apart for measurements.

Helpful UK patient explanations:

Sometimes, clinicians may use a “treatment trial” approach (trying a bile acid binder) if testing is delayed or unavailable — your doctor will guide this based on your situation.

What treatments are commonly used?

The most common medical treatments are bile acid sequestrants (also called bile acid binders). They work by binding bile acids in the gut so they don’t irritate the colon.

Examples often discussed include:

  • cholestyramine (sometimes spelled colestyramine)
  • colesevelam

Useful references (patient-friendly and UK-based):

Practical “while you wait” steps that often help

These are not cures. They’re practical levers that reduce triggers and give you data to bring to your GP.

  • Eat smaller meals (large meals = larger bile demand)
  • Reduce fat temporarily, then reintroduce slowly
  • Keep a 7-day trigger log (meal → symptoms → timing)
  • Hydration + electrolytes if you’re having frequent watery stools
  • Consider soluble fibre cautiously (introduce slowly)

If you haven’t already, start with the low-fat diet guide here →

Where Lily & Loaf fits (more direct, still responsible)

Important: supplements do not treat bile acid diarrhoea. If you suspect BAD, the right move is medical assessment (and when appropriate, medical treatment). Where supplements can help is supporting hydration, digestion and nutrient intake while you’re stabilising your routine.

These are the most practical “support categories” people explore post-cholecystectomy:

  • Electrolytes: helpful if you’re losing fluids (look for simple formulas, not mega-stimulant mixes)
  • Digestive enzymes: some people trial enzymes during food reintroduction, especially with mixed meals
  • Probiotics: sometimes used while diet patterns shift (results vary person to person)
  • Soluble fibre support: some people use fibre strategically to help stool consistency (go slow)

Lily & Loaf links (affiliate):

Safety note: if you’re on prescription medication or have ongoing diarrhoea, check with your clinician before adding supplements (some binders and fibres can affect absorption/timing of meds).

GLP-1 note: why this comes up in the same cluster

GLP-1 medications can change digestion and appetite, and rapid weight loss can increase gallstone risk in some people. That’s why this cluster links together: symptoms → causes → emergency thresholds → recovery.

Read: Did Mounjaro cause my gallstones? (science explainer) →

Read: Right-side chest/back pain on GLP-1: when to worry →

Video diary: my surgery story (authority proof)

If you want the full timeline and how “it started as nothing” becomes a real emergency, this is my diary video.

When to seek urgent help

  • Severe abdominal pain that doesn’t settle
  • Fever or chills
  • Yellowing of eyes/skin (jaundice)
  • Persistent vomiting
  • Blood in stool, black stools, or signs of dehydration

If you suspect a medical emergency, seek urgent medical care.

FAQs

1) Is diarrhoea normal after gallbladder removal?

Some people have short-term looseness after surgery. Persistent watery diarrhoea and urgency can suggest bile acid diarrhoea and should be assessed.

2) What is bile acid diarrhoea (BAD)?

It’s diarrhoea caused by excess bile acids reaching the colon, where they pull water into the bowel and irritate the lining.

3) How common is post-cholecystectomy diarrhoea?

Studies report a wide range, and not all cases are bile acid related. If symptoms persist, it’s worth investigating.

4) What is the SeHCAT test?

A UK diagnostic scan that measures how well your body retains/absorbs bile acids over a week.

5) What medications treat BAD?

Bile acid sequestrants (bile acid binders) such as cholestyramine or colesevelam are commonly used under medical supervision.

6) Can diet help bile acid diarrhoea?

Lower-fat meals and smaller portions often reduce symptoms, especially in early recovery.

7) Why do fatty foods trigger urgency?

Fat stimulates bile release. Without bile storage, larger fat loads can push more bile acids into the bowel at once.

8) What fibre is best to try?

Soluble fibre is often discussed. Introduce slowly and track your response.

9) Can probiotics help?

Some people find them helpful during diet transitions, but they don’t treat bile acid diarrhoea itself.

10) Are digestive enzymes a treatment for BAD?

No. Some people use enzymes as digestion support during food reintroduction, but they’re not a medical treatment for BAD.

11) How long should I wait before speaking to my GP?

If diarrhoea is persistent, frequent, or affecting daily life beyond the initial recovery period, speak to your GP sooner rather than later.

12) Can dehydration happen from frequent watery stools?

Yes. Monitor hydration and seek help if you feel dizzy, weak, or you’re not keeping fluids in.

13) Does gallbladder removal affect nutrient absorption?

Most people absorb nutrients normally, but persistent diarrhoea can impact hydration and routines. If symptoms persist, get assessed.

14) Does GLP-1 affect diarrhoea after surgery?

GLP-1 can change digestion and appetite. If you are restarting GLP-1 post-op, your clinician should guide timing and dose.

15) When should I go to A&E?

If you have severe pain, fever, jaundice, persistent vomiting, or signs of dehydration or serious illness, seek urgent medical care.

Disclaimer: This article shares lived experience and educational context. It does not replace professional medical advice. If you suspect a medical emergency, seek urgent care immediately.

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Low Fat Diet After Gallbladder Removal (UK Guide)

Low Fat Diet After Gallbladder Removal (UK Guide): What to Eat, What to Avoid, and How to Reintroduce Fat

Author context: I lost 6 stone on GLP-1 (Mounjaro) and had emergency NHS gallbladder surgery in February 2026. This guide is what I wish I’d had: practical, calm, medically responsible, and focused on “what to do next”.

Medical note: This is lived experience + education, not medical advice. If you have severe pain, fever, jaundice, or persistent vomiting, seek urgent medical care.

Short answer: You don’t necessarily need a permanently low-fat diet after gallbladder removal, but many people find lower-fat, smaller meals help in the first days and weeks. The goal is to reduce digestive shock, then reintroduce fats gradually based on tolerance.

If you’re here because your stomach feels “weird” after surgery (bloating, urgency, diarrhoea, fat sensitivity), you’re not alone. Your digestive system is adapting to a new bile flow pattern, and that transition is usually the roughest part.

Read my emergency surgery story here →

What changes after gallbladder removal?

Before surgery, your gallbladder stored bile and released it in a stronger “burst” when you ate fat.

After surgery, bile flows more continuously from the liver into the intestine. Most people adapt, but some notice that very fatty meals can be harder to tolerate at first.

Do you need a low-fat diet after gallbladder removal?

Not always. Several NHS patient resources note you do not need a strict long-term diet after your gallbladder is removed, but some people find fatty foods are harder to digest initially. The practical middle-ground is:

  • Week 1: go easy on fat and keep meals small
  • Weeks 2–4: reintroduce fat slowly and track what triggers symptoms
  • Long term: aim for a balanced diet and keep “mega-fat meals” as occasional treats

Useful references readers can trust:

Table: “Low fat” in real life (simple targets that work)

Timeframe Main goal Practical rule
First 7 days Avoid flare-ups Choose low-fat foods and skip fried/greasy meals
Weeks 2–4 Build tolerance Add small fats back (one change at a time)
Weeks 4–8 Normalise digestion Balanced meals; watch “fat bombs” and huge portions
Long term Stable routine Eat normally, but respect your personal triggers

What to eat in the first week

Think “boring but safe”. The aim is to reduce digestive load while your system settles.

  • Proteins: chicken breast, turkey, white fish, tofu, eggs (some tolerate eggs fine; introduce gently)
  • Carbs: rice, oats, potatoes, toast, pasta
  • Veg: cooked carrots, courgette, green beans (go easier on huge raw salads early if they bloat you)
  • Dairy: low-fat yoghurt, low-fat milk (if tolerated)
  • Snacks: bananas, rice cakes, crackers

What to avoid (at least initially)

  • Fried foods and takeaways
  • Heavy creamy sauces
  • Large portions of cheese
  • Very fatty meats (sausages, pepperoni, ribs)
  • “Fat bombs” (massive nuts + oils + chocolate in one hit)
  • Alcohol early on (also interacts with recovery meds for some people)

How to reintroduce fat without wrecking your day

The trick is not “zero fat forever”. It’s small amounts, introduced slowly, one variable at a time.

Try this progression:

  • Start with 1 teaspoon of olive oil on a meal
  • Then a small portion of avocado
  • Then a small portion of salmon
  • Then a normal portion of nuts (not half a bag)
  • Then test “richer” foods occasionally

If something triggers urgency or cramps, don’t panic. Pause, revert to “safe foods” for 24–48 hours, then try a smaller portion later.

Diarrhoea after gallbladder removal: what’s going on?

Some people experience diarrhoea after surgery. One reason is that bile can reach the bowel more continuously and irritate the colon. Studies report a wide range for post-cholecystectomy diarrhoea and bile acid diarrhoea (BAD), partly because not everyone is tested and definitions vary.

Key takeaway: if diarrhoea is persistent, frequent, or impacting quality of life, talk to your GP. BAD is treatable.

For readers who want the medical context:

Video diary: my surgery story (authority proof)

This is my full video diary walking through symptoms, escalation, and the NHS emergency process.

Where Lily & Loaf fits (more direct, still compliant)

Let’s be clear: supplements don’t treat gallstones and they don’t replace medical care. Where they can help is supporting digestion and nutrition while you’re rebuilding a routine.

Here are the most common “support” categories people explore after gallbladder removal, and why:

  • Digestive enzymes: some people use enzymes to support digestion while reintroducing fat and protein
  • Electrolytes: useful if you’re having loose stools or struggling with hydration
  • Soluble fibre support: can help normalise stool consistency for some people (introduce slowly)
  • Probiotics: some people try them to support gut balance during diet changes
  • Omega-3: a gentler fat source for some people than greasy foods (start small)

Browse those categories (affiliate links):

Compliance note: If you’re on prescription meds, have ongoing diarrhoea, or you’re post-op with complications, check with your clinician before adding supplements.

GLP-1 note: why this matters if you’re losing weight

If you’re on GLP-1 and losing weight rapidly, gallstones are a known risk factor of fast weight loss. That’s why symptom awareness matters more than fear.

Read: Did Mounjaro cause gallstones? (the science) →

Read: Gallbladder attack vs trapped wind →

Simple 3-day low-fat meal plan (starter)

This is not a forever plan. It’s a “reset your digestion” plan.

Day Breakfast Lunch Dinner
1 Oats + banana Chicken + rice + cooked veg White fish + potatoes + carrots
2 Toast + low-fat yoghurt Turkey wrap (light) + soup Tofu stir-fry (minimal oil) + rice
3 Oats + berries Tuna (water) + potato + veg Chicken pasta (tomato-based, not creamy)

When to seek urgent help

  • Severe abdominal pain that doesn’t settle
  • Fever or chills
  • Yellowing of eyes/skin (jaundice)
  • Persistent vomiting

If you have these symptoms, seek urgent medical care.

FAQs

1) Do you need a low-fat diet forever after gallbladder removal?

No. Many people return to a normal balanced diet. However, some find very fatty meals trigger symptoms, especially early on.

2) How long should I eat low fat after surgery?

Many people find the first week is the most sensitive. Reintroduce fats slowly over weeks 2–4 based on tolerance.

3) Why do I get diarrhoea after gallbladder removal?

Continuous bile flow can irritate the bowel in some people. If it’s persistent, speak to your GP — bile acid diarrhoea is treatable.

4) What foods usually trigger symptoms?

Fried foods, creamy sauces, high-fat meats, large cheese portions, and very large meals are common triggers early on.

5) Can I eat eggs after gallbladder removal?

Many people can, but it varies. Start small and see how your body reacts.

6) Is olive oil okay?

Often yes in small amounts. Reintroduce gradually, starting with tiny portions.

7) Should I avoid fibre?

No, but increase fibre slowly. Sudden large fibre increases can worsen bloating.

8) Can probiotics help?

Some people try probiotics during dietary changes. They’re not a treatment for surgery complications, but may support gut balance for some.

9) Do digestive enzymes help after gallbladder removal?

Some people use them to support digestion during food reintroduction. They’re not a medical treatment — think “support”, not “fix”.

10) Can I drink alcohol after surgery?

Follow your surgical team’s guidance. Many people wait until recovery is stable and medications are finished.

11) Why do fatty meals hit harder now?

Without bile storage, large fat loads can be harder to process quickly, especially early on.

12) Is nausea normal after surgery?

It can happen early in recovery, but persistent or worsening nausea should be assessed.

13) What’s the best meal pattern?

Smaller meals more often is commonly easier than 1–2 large meals.

14) Does GLP-1 change digestion after gallbladder removal?

GLP-1 can slow gastric emptying and change appetite. If you’re restarting GLP-1 post-op, your clinician should guide timing and dose.

15) When should I call my GP?

If diarrhoea persists, symptoms worsen, or you can’t keep food/hydration stable, speak to your GP or surgical team.

Disclaimer: This article shares lived experience and educational context. It does not replace professional medical advice. If you suspect a medical emergency, seek urgent care immediately.

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Ruptured Gallbladder: Symptoms, Timeline and Emergency Care Explained (UK)

What Happens If a Gallbladder Bursts? Symptoms, Risks and Emergency Signs (UK Guide)

Author context: After losing 6 stone on GLP-1 (Mounjaro), I required emergency NHS gallbladder surgery due to obstruction and inflammation. Surgeons warned my gallbladder could have ruptured within days. This guide explains what rupture means and why urgent care matters.

Short answer: If a gallbladder bursts (ruptures), bile and infection can leak into the abdominal cavity. This can lead to peritonitis, sepsis and life-threatening complications. A ruptured gallbladder is a medical emergency requiring urgent hospital treatment.

If you’re here because of severe right-side pain, read this carefully.

Read my full emergency surgery story here →

Can a gallbladder actually burst?

Yes. Severe inflammation (acute cholecystitis), untreated infection, or prolonged obstruction from gallstones can cause the gallbladder wall to weaken and perforate.

This is called a gallbladder rupture or perforation.

What happens when a gallbladder ruptures?

When rupture occurs:

  • Bile leaks into the abdominal cavity
  • Bacteria can spread
  • Inflammation becomes widespread
  • Peritonitis may develop
  • Sepsis risk increases

This progression can happen rapidly if infection is severe.

Warning signs of possible rupture

Seek urgent medical care if you experience:

  • Severe, worsening upper right abdominal pain
  • Fever or shaking chills
  • Rapid heart rate
  • Confusion or weakness
  • Yellowing of eyes (jaundice)
  • Persistent vomiting

These symptoms require emergency assessment.

Table: Gallbladder Attack vs Possible Rupture

Feature Gallbladder Attack Possible Rupture
Pain Severe, steady Worsening, spreading
Fever May occur Common and high
Systemic symptoms Usually limited Weakness, confusion, rapid pulse
Urgency Urgent Emergency

How fast can this happen?

Rupture usually follows untreated severe inflammation or infection. In some cases, deterioration can happen over days. In others, progression is faster if infection spreads.

Does GLP-1 increase rupture risk?

GLP-1 medications themselves do not directly cause rupture. However, rapid weight loss may increase gallstone risk in some individuals, which can lead to obstruction and inflammation if untreated.

Read more about GLP-1 and gallstones here →

My experience

Surgeons explained that my gallbladder was severely inflamed and close to rupture. Acting quickly prevented a far more serious complication.

What treatment involves

  • Emergency hospital admission
  • Antibiotics
  • Imaging scans
  • Surgical removal (cholecystectomy)

Prompt treatment significantly reduces complications.

FAQs

Is a ruptured gallbladder fatal?

It can be life-threatening without treatment, but outcomes improve greatly with prompt medical care.

How do doctors detect rupture?

Blood tests, imaging scans and physical examination help identify perforation and infection.

Can gallstones always cause rupture?

No. Many gallstones remain asymptomatic. Rupture occurs when severe inflammation or infection progresses untreated.

How long does recovery take after emergency surgery?

Most people recover within weeks, though severe infections may extend recovery time.

Should GLP-1 users be worried?

Most GLP-1 users never experience gallbladder complications. Awareness of symptoms is more important than fear.

Disclaimer: This article provides educational information and lived experience. It does not replace professional medical advice. If you suspect a medical emergency, seek urgent care immediately.

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Chest Pain on Mounjaro? Right Side or Back Pain Explained (UK)

Right Side Chest or Back Pain on GLP-1: When to Worry (UK Guide)

Author context: After losing 6 stone on Mounjaro (GLP-1), I experienced right-side abdominal and back pain that escalated into emergency NHS gallbladder surgery. This guide explains what right-side pain can mean — and when to seek urgent care.

Short answer: Mild right-side chest or back discomfort on GLP-1 can sometimes be digestive. However, persistent upper right pain lasting more than 1–2 hours — especially with nausea, fever, or jaundice — may indicate gallbladder issues and requires urgent assessment.

If you’re Googling this in discomfort, read calmly and check your symptoms against the guide below.

Read my full emergency surgery story here →

Where is gallbladder pain usually felt?

Gallbladder pain is typically felt in the upper right abdomen under the ribs. It may radiate to the back or right shoulder blade and can sometimes feel like chest discomfort.

  • Upper right abdominal pain
  • Right shoulder blade pain
  • Mid-back pain
  • Occasionally chest tightness

Chest pain vs digestive pain on GLP-1

GLP-1 medications slow gastric emptying. This can sometimes cause bloating or discomfort.

However, gallbladder pain behaves differently.

Feature Digestive Discomfort Gallbladder Pain
Pain type Bloating, pressure Steady, intense
Duration Fluctuates 1–6 hours
Radiation Rare Back / shoulder blade
Improves with movement Often Usually no

When to worry

  • Pain lasting more than 1–2 hours
  • Fever or chills
  • Yellowing of eyes
  • Persistent vomiting
  • Worsening right-side pain

If these apply, seek urgent medical care.

Why GLP-1 users should be aware

Rapid weight loss can increase gallstone risk. If right-side pain develops during GLP-1 treatment, it should not automatically be dismissed as “just wind.”

Read the science behind GLP-1 and gallstones →

My experience

I initially thought the pain was trapped wind. It wasn’t. It persisted, radiated to my back, and did not improve with movement.

FAQs

Can GLP-1 cause chest pain?

GLP-1 may cause digestive discomfort, but persistent right-side pain should be assessed medically.

Is shoulder blade pain linked to gallstones?

Yes, referred pain to the right shoulder blade is common in gallbladder attacks.

Should I go to A&E for right-side chest pain?

If severe, persistent, or accompanied by fever or jaundice, seek urgent care.

How long does gallbladder pain last?

Typically 1–6 hours and does not improve with position changes.

Can rapid weight loss trigger pain?

Rapid weight loss can increase gallstone risk, which may lead to pain episodes.

Disclaimer: This article shares lived experience and educational context. It does not replace professional medical advice.

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Is It Trapped Wind or a Gallbladder Attack? Symptoms Explained (UK)

Gallbladder Attack vs Trapped Wind: How to Tell the Difference (UK Guide)

Author context: After losing 6 stone on GLP-1 (Mounjaro), I mistook early gallbladder symptoms for trapped wind. It escalated into emergency NHS surgery. This guide explains the difference clearly and calmly.

Short answer: Trapped wind usually causes shifting, cramp-like discomfort that improves with movement or passing gas. A gallbladder attack typically causes steady, intense pain in the upper right abdomen that may spread to the back or shoulder and does not improve with position changes.

If you’re here because of right-side pain, this guide will help you decide whether it’s likely digestive gas or something that needs medical assessment.

Read my emergency gallbladder surgery story here →

What does trapped wind feel like?

Trapped wind (gas pain) usually causes:

  • Cramping or bloating
  • Pain that moves around the abdomen
  • Relief after burping or passing gas
  • Improvement with walking or changing position

It can feel sharp at times, but it typically fluctuates rather than staying constant.

What does a gallbladder attack feel like?

A gallbladder attack causes steady, severe pain in the upper right abdomen. It may spread to the back or right shoulder blade and often worsens after eating fatty foods. The pain can last several hours and does not ease with movement.

  • Persistent pain under right ribs
  • Back or shoulder blade pain
  • Nausea
  • Worsening after fatty meals
  • Pain lasting more than 1–2 hours

Table: Gallbladder Attack vs Trapped Wind

Feature Trapped Wind Gallbladder Attack
Pain type Crampy, shifting Steady, intense
Location Anywhere in abdomen Upper right abdomen
Radiation Rare Back / right shoulder blade
Improves with movement? Often yes Usually no
Duration Minutes to short bursts 1–6 hours

My early mistake

When I first experienced pain, I assumed it was trapped wind.

But the pain:

  • Stayed in one place
  • Radiated into my back
  • Did not improve when I moved

That difference matters.

When to seek urgent medical care

  • Severe pain lasting more than 1–2 hours
  • Fever or chills
  • Yellowing of eyes (jaundice)
  • Persistent vomiting

If you’re unsure — especially with right-side pain — get assessed.

Why GLP-1 users should pay attention

Rapid weight loss can increase gallstone risk. If you’re on GLP-1 and experiencing persistent right-side pain, don’t assume it’s just indigestion.

Read the science behind GLP-1 and gallstones →

Digestive support (educational only)

Some people exploring dietary adjustments look at digestive enzyme blends during recovery or fat tolerance changes.

Browse digestion support options at Lily & Loaf

Supplements do not treat gallstones or replace medical care.

FAQs

Can trapped wind last for hours?

Gas pain usually fluctuates and improves with movement or passing gas.

How long does a gallbladder attack last?

Typically 1–6 hours and does not improve with position changes.

Can gallbladder pain feel like chest pain?

Yes, it can mimic chest or upper abdominal pain.

Is right shoulder blade pain linked to gallstones?

Yes, referred pain to the right shoulder blade is common.

Should I go to A&E for right-side pain?

If severe or persistent with other symptoms, seek urgent care.

Disclaimer: This article shares lived experience and educational context. It does not replace professional medical advice.

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GLP-1 and Gallstones: Was It Mounjaro or the Weight Loss? (UK)

Did Mounjaro Cause My Gallstones? The Science Explained (UK)

Short answer: Mounjaro (a GLP-1 medication) does not directly “create” gallstones — but the rapid weight loss that can happen on GLP-1 treatment can increase gallstone risk in some people.

If you’ve developed gallstones while losing weight on Mounjaro, you’re not alone. I ended up needing emergency NHS gallbladder surgery after losing 6 stone on GLP-1 — and this post explains what the evidence and physiology suggest, without panic or overclaiming.

Read my full emergency surgery story here →

Does Mounjaro cause gallstones?

Mounjaro does not directly form gallstones. However, significant and rapid weight loss — which often occurs with GLP-1 medications — is a recognised risk factor for gallstone formation.

Gallstones commonly form when:

  • The liver releases more cholesterol into bile during fat loss
  • The gallbladder empties less often or less completely
  • Cholesterol crystals build up and solidify into stones

This is why gallstones also occur with:

  • Very low calorie diets
  • Bariatric surgery
  • Rapid fat loss programmes
  • GLP-1 assisted weight loss

Why rapid weight loss increases gallstone risk

When body fat breaks down quickly, bile composition can change.

  • Cholesterol concentration in bile can increase
  • Gallbladder motility can reduce (it may “sit” fuller for longer)
  • Bile can crystallise more easily, forming stones over time

In plain English: the faster the weight comes off, the more your bile environment can shift toward stone formation in susceptible people.

Are gallstones listed as a GLP-1 side effect?

Gallbladder-related events are listed as a possible adverse event in GLP-1 medication documentation, which makes sense because GLP-1 treatment can lead to substantial weight loss.

But important nuance:

  • Risk is not the same as certainty
  • Most people on GLP-1 do not develop gallstones
  • Speed of weight loss and personal risk factors matter

This is the difference between “associated with” and “directly caused by.”

What happened to me (quick version)

I lost 6 stone over 12 months on Mounjaro.

Then I developed symptoms I nearly dismissed:

  • Upper right abdominal pain
  • Back / shoulder blade pain
  • Episodes that didn’t behave like normal indigestion

Blood tests showed inflammation. Imaging confirmed obstruction. Emergency surgery followed.

Full timeline and symptoms here →

Who is most at risk of gallstones during GLP-1 weight loss?

  • People losing weight very rapidly
  • Anyone with previous gallstones or gallbladder “sludge” history
  • People with strong metabolic changes from obesity
  • Those on extreme calorie restriction alongside medication

In real life, it’s rarely “one thing.” It’s usually a combination.

Should you stop Mounjaro if you develop gallstones?

Do not stop prescribed medication without medical advice.

What happens next depends on:

  • How severe your symptoms are
  • Whether there’s infection or obstruction
  • Whether surgery is required
  • Your prescriber’s plan for risk vs benefit

Many people continue GLP-1 treatment after gallbladder removal under supervision.

Can you prevent gallstones during rapid weight loss?

There’s no guaranteed prevention method, but clinicians commonly discuss:

  • Avoiding crash dieting alongside GLP-1
  • Aim for steady loss when possible
  • Keeping diet consistent and not “yo-yoing” intake
  • Acting early if symptoms appear

If pain matches gallbladder patterns, getting assessed early is the safest move.

When to seek urgent medical help

  • Severe pain lasting more than 1–2 hours
  • Fever, chills, shaking
  • Yellowing of eyes/skin (jaundice)
  • Persistent vomiting
  • Worsening pain you can’t “ride out”

Optional digestion support (educational only)

During recovery and dietary changes, some people explore gentle digestion support — not as a treatment, but to support normal digestion while they work out what foods feel okay again.

Browse digestive support options at Lily & Loaf

Important: Supplements do not prevent gallstones and do not replace medical care. If you’re in severe pain or worried, seek urgent assessment.

FAQs

Can GLP-1 medications increase gallstone risk?

Rapid weight loss is a recognised risk factor. GLP-1 medications may increase risk indirectly in some people because they can lead to substantial weight loss.

Are gallstones common on Mounjaro?

They’re not common for most users, but gallbladder events are a recognised potential risk, especially during faster weight loss.

Is it the drug or the weight loss?

For many people the biggest driver is the speed of weight loss. Medication can contribute indirectly by accelerating fat loss.

Can you take Mounjaro after gallbladder removal?

Many people do, under medical supervision. Your clinician should guide timing and dosing after surgery.

What should I do if I have right-side pain on GLP-1?

If pain is severe, persistent, or comes with fever, vomiting or jaundice, seek urgent medical care.

Disclaimer: This article shares personal experience and educational context. It does not replace professional medical advice. If you have severe symptoms, fever, jaundice, persistent vomiting, or escalating pain, seek urgent medical care.