Gallstones are among the most common abdominal conditions in the UK, affecting approximately 10–15% of adults. Most are silent and never cause problems — but when they do, the pain can be among the most intense a person experiences. Here’s what you need to know.
How Gallstones Form
Bile — produced by the liver and stored in the gallbladder — is a complex mixture of bile acids, cholesterol, lecithin and bilirubin. Gallstones form when the balance between these components is disrupted. Cholesterol stones (80–85% of UK gallstones) develop when bile becomes supersaturated with cholesterol relative to bile acids — the cholesterol crystallises and aggregates into stones. Pigment stones (15–20%) form from excess bilirubin, typically in haemolytic anaemia or liver cirrhosis. A gallbladder that contracts infrequently (hypomotility) allows bile to stagnate, further concentrating components and accelerating stone formation.
The Classic Risk Factors: The 5 Fs
Traditionally described as the “4 Fs” (Female, Fat, Forty, Fertile), a fifth — Family history — is increasingly recognised: Female: oestrogen increases cholesterol secretion into bile; women are 2–3 times more likely than men to develop gallstones. Fat: obesity increases biliary cholesterol saturation and reduces gallbladder motility. Forty: prevalence rises steeply with age. Fertile: pregnancy and oestrogen-containing contraceptives increase risk significantly. Family: first-degree relatives of gallstone sufferers have 2–4× higher risk. Additional risk factors include Type 2 diabetes, rapid weight loss, very low-fat diets, total parenteral nutrition, Crohn’s disease, and certain medications.
Recognising the Symptoms
Biliary colic is the characteristic presentation. A gallstone temporarily blocks the cystic duct when the gallbladder contracts in response to eating fat. The result: sudden, severe, constant (not crampy) pain in the right upper abdomen or epigastrium, often radiating to the right shoulder or between the shoulder blades. Onset typically 30–90 minutes after a fatty meal. Duration 30 minutes to several hours before spontaneously resolving. Nausea and vomiting are common. The pain can be extraordinarily severe — often the worst pain the individual has experienced.
Acute cholecystitis: if the obstruction persists — fever, persistent right upper quadrant pain that doesn’t resolve, positive Murphy’s sign (pain on deep palpation under the right ribcage during inspiration). Medical emergency.
Obstructive jaundice: if a stone passes into the common bile duct — yellow skin and eyes, dark urine, pale stools. Urgent hospital assessment needed.
Dietary Strategies for Symptomatic Management
Until surgery is performed, diet can significantly reduce the frequency and severity of biliary colic attacks by minimising gallbladder contraction: Reduce fat content of meals — particularly large amounts of fat at once, which trigger the strongest gallbladder contractions. Avoid fried food, full-fat dairy and fatty cuts of meat in quantity. Eat small, regular meals — keeps bile flowing and reduces stasis. Skipping meals increases stasis. Avoid crash dieting — paradoxically, very rapid weight loss (more than 1.5kg per week) is a strong trigger for new gallstone formation, because the liver excretes excess mobilised cholesterol into bile while reduced fat intake means bile sits longer. Aim for gradual weight loss: 0.5–0.75kg per week maximum. Increase dietary fibre — reduces bile acid reabsorption and may reduce stone formation risk. Adequate hydration — keeps bile more fluid.
Frequently Asked Questions About Gallstones
Can gallstones be dissolved without surgery?
Ursodeoxycholic acid (UDCA) can slowly dissolve small, pure cholesterol gallstones in carefully selected patients — but it takes 12–24 months, success rates are around 50–60%, and recurrence rates after stopping treatment are high (up to 50% within 5 years). It is reserved for people who cannot or will not have surgery. For most symptomatic patients, laparoscopic cholecystectomy (keyhole surgery to remove the gallbladder) is the definitive, low-risk treatment of choice.
What happens if I ignore gallstones?
Truly asymptomatic gallstones can be safely monitored — the annual risk of developing complications is low (approximately 1–2% per year). Once symptoms develop, the annual complication risk rises to 2–3% and accumulates over time. Complications — acute cholecystitis, gallstone pancreatitis, obstructive jaundice — are serious and carry significantly higher surgical risk as emergencies than planned elective cholecystectomy. Most gastroenterology guidelines recommend cholecystectomy for symptomatic patients.
Can I eat normally after having my gallbladder removed?
Yes — for most people, the long-term dietary impact is minimal. Without the gallbladder, bile drips continuously from the liver rather than being stored and released in response to fat. Some people experience loose stools or discomfort with high-fat meals during the first few months. Long-term, approximately 5–10% of people develop bile acid malabsorption causing post-cholecystectomy diarrhoea — this is very effectively treated with cholestyramine or colesevelam if persistent.
Is gallstone pain always after fatty food?
Typically, but not always. Gallbladder contractions are also triggered by protein and by the natural gastrocolic reflex (which occurs after eating generally). Some patients get attacks after apparently innocuous meals. The relationship to eating in general — particularly the onset 30–90 minutes after eating — and the characteristic location and radiation pattern are more diagnostically reliable than specific food association. Ultrasound is the definitive investigation — it’s safe, radiation-free and identifies gallstones with over 95% sensitivity.
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