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A small number of people with gallstones may develop serious problems if the gallstones block a bile duct or move into another part of the digestive system.
If a bile duct becomes permanently blocked, it can lead to a build-up of bile inside the gallbladder. This can cause the gallbladder to become infected and inflamed.
The medical term for inflammation of the gallbladder is acute cholecystitis.
Symptoms include:
An estimated 1 in 10 people with acute cholecystitis also experience jaundice.
Acute cholecystitis is usually first treated with antibiotics to settle the infection and then keyhole surgery to remove the gallbladder.
The operation can be more difficult when performed as an emergency, and there's a higher risk of it being converted to open surgery.
Sometimes a severe infection can lead to a gallbladder abscess (empyema of the gallbladder). Antibiotics alone don't always treat these and they may need to be drained.
Occasionally, a severely inflamed gallbladder can tear, leading to inflammation of the inside lining of the abdomen (peritonitis).
If this happens, you may need antibiotics given directly into a vein (intravenous antibiotics), and surgery may be required to remove a section of the lining if part of it becomes severely damaged.
Read more about acute cholecystitis.
You can get jaundice if a gallstone passes out of the gallbladder into the bile duct and blocks the flow of bile.
Symptoms of jaundice include:
Sometimes the stone passes from the bile duct on its own. If it doesn't, the stone needs to be removed.
If the bile ducts become blocked, they're vulnerable to infection by bacteria. The medical term for a bile duct infection is acute cholangitis.
Symptoms of acute cholangitis include:
Antibiotics will help treat the infection, but it's also important to help the bile from the liver to drain with an endoscopic retrograde cholangio-pancreatography (ERCP).
Acute pancreatitis may develop when a gallstone moves out of the gallbladder and blocks the opening (duct) of the pancreas, causing it to become inflamed.
The most common symptom of acute pancreatitis is a sudden severe dull pain in the centre of your upper abdomen, around the top of your stomach.
The pain of acute pancreatitis often gets steadily worse until it reaches a constant ache.
The ache may travel from your abdomen and along your back, and may feel worse after eating.
Leaning forward or curling into a ball may help relieve the pain.
Other symptoms of acute pancreatitis can include:
There's currently no cure for acute pancreatitis, so treatment focuses on supporting the body's functions until the inflammation has passed.
This usually involves admission to hospital so you can be given:
With treatment, most people with acute pancreatitis improve within a week and are well enough to leave hospital after 5 to 10 days.
Read more about acute pancreatitis.
Gallbladder cancer is a rare but serious complication of gallstones. Around 1,100 cases of gallbladder cancer are diagnosed in the UK each year.
Having a history of gallstones increases your risk of developing gallbladder cancer. Most people who have cancer of the gallbladder also have a history of gallstones.
But most people who have had gallstones do not develop gallbladder cancer.
If you have additional risk factors, such as a family history of gallbladder cancer or high levels of calcium inside your gallbladder, it may be recommended that your gallbladder be removed as a precaution, even if your gallstones aren't causing any symptoms.
The symptoms of gallbladder cancer are similar to those of complicated gallstone disease, including:
Gallbladder cancer can be treated with a combination of surgery, chemotherapy and radiotherapy.
Gallstone ileus is another rare but serious complication of gallstones. It's where the bowel becomes obstructed by a gallstone.
Gallstone ileus is where an abnormal channel, known as a fistula, opens up near the gallbladder. Gallstones are able to travel through the fistula and can block the bowel.
Symptoms of gallstone ileus include:
A bowel obstruction requires immediate medical treatment. If it's not treated, there's a risk that the bowel could split open (rupture). This could cause internal bleeding and widespread infection.
Contact your GP as soon as possible if you think you have an obstructed bowel. If this isn't possible, phone NHS 111.
Surgery is usually needed to remove the gallstone and unblock the bowel. The type of surgery you have will depend on where the obstruction in the bowel is.
