Gallstones are crystals that form from excess cholesterol or bilirubin. Most cases cannot be prevented. Diagnosis of gallstones starts with a medical history and physical exam. Blood tests are often done to rule out other causes or detect complications. An ultrasound may be ordered to check for gallstones.
Many people have asymptomatic gallstones for years without any problem.
Gallstones are not contagious and pose no risk to others. Asymptomatic gallstones are not usually treated. For example, gallstones are often discovered by accident when an X-ray is done for another reason. If gallstones are causing symptoms, a person may want to consider surgery. Surgery is usually not required for uncomplicated gallstones, but a person may want it done.