Hello, Thank you for asking your question at health care magic Acute onset of left lower abdominal pain raises the possibility of Diverticulitis. Diverticulitisis is infection of Diverticulum which is a small outpouching from the colon. Diverticulitisis is treated with antibiotics . Other possibilities for such pain include inflammatory bowel disease, infections, Urinary tract infections etc. If you are a female ectopic pregnancy (in reproductive age group) ,ovarian cyst and ovarian torsion is also a possibility and should be ruled out. Physical examination and investigations including blood,urine test and CT scan is required to make a definite diagnosis. I recommend that you go to the emergency room for further management. Hope I was able to help you Please feel free to address any more concerns Regards, Dr.Lekshmi