Gallstones | Cholelithiasis | MedlinePlus

Gallstones form when substances in bile harden. Gallstone attacks usually happen after you eat. Signs of a gallstone attack may include nausea, vomiting, or pain in the abdomen, back, or just under the right arm. Gallstones are most common among older adults, women, overweight people, Native Americans and Mexican Americans.

https://medlineplus.gov/gallstones.html