<human>: upper left side abdominal, sharp pressure just under rib cage, chronic pain for 4 months after eating, sometimes immediately and other times within 1 to 2 hrs - pain last for 3 to 8 hours and diarrhea sometimes- pain also can wake me up at night and last for 2 to 3 hrs - the only thing that seems to ease the pain is a heating pad. when pain comes on abdominal swelling and nausea
<bot>: HI. Your history of pain in abdomen with diarrhea, abdominal swelling, increasing after food on the left side under the left rib cage is suggestive of following things:-Colitis of the left colon_Gastric ulcer / Cancer-Pancreatitis. As the most probable cause. I would suggest you to undergo the investigations first to find out the cause properly to facilitate proper treatment :::Blood-complete blood picture, kidney functions tests, blood sugar fasting and post-lunch, Urine-routine, microscopy, culture and sensitivity (before start of antibiotic)Stool-routine, microscopy, occult bloodUltrasonography of abdomen. CT scan of the abdomen ColonoscopyUpper GI Endoscopy these test will give us the diagnosis to decide the proper and curative treatment.