Gallstones: Symptoms, Diet and When Surgery Is Needed

Gallstones are extremely common and, most of the time, completely silent. They are often found by accident on a scan done for something else, which leaves people worrying about a condition that may never trouble them. When they do cause trouble, the pain is memorable and the decision becomes surgical rather than dietary. Here is how to tell the difference and what the evidence supports.

Gallstones: the short answer

Gallstones form in the gallbladder, a small sac under the liver that stores bile. Most are made of cholesterol that has come out of solution. Around two thirds of people with gallstones never develop symptoms, and silent stones generally do not need treatment. Of those with stones, roughly 15 to 25 percent develop symptoms over the following 10 to 15 years.

Once stones cause symptoms, the picture changes. The standard treatment for symptomatic gallstones is removing the gallbladder, usually by keyhole surgery, because attacks tend to recur and complications become more likely. European guidance explicitly advises against treating asymptomatic stones. Diet can reduce how often attacks occur and lowers the risk of forming stones in the first place, but no diet dissolves existing stones.

What an attack feels like

Biliary colic has a recognisable pattern. Pain begins in the upper right abdomen or just below the breastbone, builds over minutes to a steady intense ache, and often radiates to the right shoulder blade or back. It typically starts 20 to 30 minutes after eating, especially a fatty meal, and lasts from a few minutes to several hours before fading. Nausea and vomiting are common.

That pattern distinguishes it from indigestion, which is usually milder and shorter, and from reflux, which burns rather than grips. The features that signal a complication rather than simple colic are fever, chills, sweating, jaundice with yellowing of the eyes or skin, pale stools and dark urine, or pain that will not settle. Those suggest inflammation of the gallbladder, a blocked bile duct or pancreatitis, and they need urgent assessment rather than another dose of painkillers.

Who develops them and why

Risk factors are well established and partly explain why gallstones are so common. Being female, being over 40, being overweight, pregnancy, diabetes, a family history, and oestrogen-containing medication all increase the chance. The traditional teaching shorthand is unflattering but reflects the epidemiology.

Two risk factors surprise people because they involve apparently healthy behaviour. Rapid weight loss is a strong trigger, including after bariatric surgery or on very low calorie diets, because cholesterol mobilises quickly and bile becomes concentrated. Frequent fasting or skipping meals also raises risk, since the gallbladder empties less often and bile sits still. Losing weight at a steadier pace of around half to one kilogram a week, and eating regularly rather than skipping meals, both reduce that risk meaningfully.

What diet can and cannot do

Diet does not dissolve stones, and anyone selling a gallbladder flush is selling a story. What diet can do is reduce attacks and lower the chance of forming new stones. Observational research associates Mediterranean-style and DASH-style patterns with lower gallstone risk, while diets high in refined sugar and saturated fat are linked with higher risk, and fibre appears protective.

• Eat regular meals rather than skipping or fasting for long stretches.
• Keep fat moderate and spread across the day rather than concentrated in one large fatty meal, which triggers strong gallbladder contraction.
• Favour unsaturated fats such as olive oil and nuts over fried and processed foods.
• Increase fibre from vegetables, legumes and whole grains.
• Lose weight gradually if needed, around half to one kilogram a week.
• Stay physically active, which is associated with lower risk.
• Identify personal triggers, since many people can predict which meals provoke an attack.

If you have had an attack, these measures may reduce how often they happen while you decide about surgery, but they do not remove the underlying problem.

One practical point about fat: cutting it to almost nothing is not the answer either. Very low fat diets mean the gallbladder contracts rarely, bile sits still and stones can form more readily, which is part of why rapid weight loss raises risk. Moderate fat spread across regular meals keeps the gallbladder emptying without provoking the strong contraction that a single large fatty meal triggers.

Surgery: when it is the right call

Keyhole removal of the gallbladder is the usual treatment once stones cause symptoms. Most people tolerate it well, go home the same day or the next, and return to normal activity within a week or two. You can live perfectly well without a gallbladder, as bile simply flows continuously from the liver into the intestine. Some people have looser stools or more frequent bowel movements afterwards, which usually settles over weeks to months.

For silent stones, surgery is generally not recommended, and the risks of an operation, including the small risk of bile duct injury, outweigh the benefit. There are exceptions where removal may be discussed despite no symptoms, including a calcified porcelain gallbladder, which carries a raised cancer risk, certain blood disorders requiring spleen removal, and some transplant candidates. Non-surgical options such as dissolution medication and shockwave treatment exist but are reserved for people who cannot have surgery, since they work slowly and stones commonly return.

When to see a doctor

See a doctor if you have had an episode of severe upper abdominal pain lasting more than a few minutes, particularly after eating, or recurring bouts of pain with nausea. An ultrasound scan is the usual first test and is quick and painless. If stones are found incidentally and you have no symptoms, no treatment is normally needed, although it is worth knowing which symptoms would change that.

Seek urgent care for abdominal pain with fever or chills, yellowing of the skin or eyes, pale stools with dark urine, persistent vomiting, or pain that does not settle within a few hours. These suggest infection, a blocked duct or pancreatitis, all of which need prompt treatment. This is general information rather than medical advice. The reassuring summary is that most gallstones are harmless bystanders, and the ones that are not have a clear and effective solution.

Frequently asked questions

What are the symptoms of gallstones?

Most cause none. When they do, pain builds in the upper right abdomen 20 to 30 minutes after eating, often radiating to the right shoulder blade, lasting minutes to hours, with nausea.

Do gallstones always need surgery?

No. Silent gallstones are usually left alone. Surgery is standard once stones cause symptoms, because attacks recur and complications become more likely.

What foods should I avoid with gallstones?

Large fatty meals, fried and heavily processed foods, and long gaps between meals. Regular meals with moderate fat, more fibre and unsaturated fats are better tolerated.

Can you dissolve gallstones naturally?

No. Gallbladder flushes and cleanses do not work. Dissolution medication exists but is slow, reserved for people unable to have surgery, and stones often return.

Can you live without a gallbladder?

Yes. Bile flows continuously from the liver instead of being stored. Some people have looser or more frequent stools for a few weeks or months afterwards.

Read next

• Fatty Liver Disease (MASLD): The Quiet Condition Millions Have

  Another common finding on abdominal scans.

• Acid Reflux: What Actually Helps, and What Is a Waste of Time

  Telling reflux from gallbladder pain.

• Ozempic and Gallbladder Problems: What You Need to Know

  Why rapid weight loss raises gallstone risk.

This article is for general informational purposes only and is not medical advice. Always consult a qualified healthcare professional about your individual situation, and never start or stop a medication without your doctor. See our Medical Disclaimer.