hi. noted history of gallstones associated with abdominal pain. your father seems to have frequent attacks of biliary colic secondary to stones. it is best if he consult with a doctor, preferably a general surgeon, for complete physical examination and clinical evaluation. diagnostics (such as ultrasound, blood exams, etc) will be recommended as needed. management (medical and surgical) will be directed accordingly. definitive treatment for gallstones is cholecystecomy or surgical removal of your gallbladder along with the stones. it could be done laparoscopically (goldstandard) or thru open technique. in your father s case, it is better to have it done as an elective or scheduled cholecystectomy (not as an emergent case but with urgency in terms of management) with preoperative cardiopulmonary clearance, for lesser complications and better post-operative course. low fat diet is also recommended. hope this helps. good day!! ~dr.kaye