Menu Healthy Lifestyle Diseases & Conditions First Aid Symptoms Tests & Procedures Videos Definitions FAQs GallstoneUpdated: 2017-06-13OverviewGallstones are hardened deposits of digestive fluid that can form in the small organ under the liver (gallbladder).SymptomsGallstones can vary in size and number and may or may not cause symptoms.TreatmentsPeople who experience symptoms usually require gallbladder removal surgery. Gallstones that don't cause symptoms usually don't need treatment. © 1998-2022 Mayo Foundation for Medical Education and Research(MFMER). All rights reserved. Terms of Use