(HealthDay News) -- Gallstones are hard, pebble-like pieces that form in the gallbladder, says the National Institute of Diabetes and Digestive and Kidney Diseases.
Many people who have gallstones do not have symptoms and typically don't require treatment.
The agency mentions these signs of gallstones that require medical attention:
- Pain in the abdomen lasting several hours.
- Nausea and vomiting.
- Fever or chills.
- Yellowish skin or whites of the eyes.
- Tea-colored urine and light-colored stools.
These symptoms can indicate a serious infection or inflammation of the gallbladder, liver or pancreas. Immediate medical attention is strongly encouraged.