Good dr i have a sharp pain in my lower stomach sometimes by the waist on the left hand side. what could this be?? please help it comes and goes away and comes again

Many causes : In a woman causes of left lower abdominal pain can include: ovarian cyst, diverticulitis, endometriosis, hernia, ovulation pain, Crohn’s Disease, renal infection or stone or injury just to mention a few. If pain is chronic get it checked out –especially if associated with change in bowel habitus. Severe abdominal pain warrants ER visit.