Hi ! Good evening. I am Dr Shareef answering your query. If I were your doctor, I would advise you to avoid eating from outside if you do to avoid any intestinal infection creeping in from unhygienic-ally cooked food.Also some component of the food you eat outside specially the fast food might cause some hyper-sensitivity reaction to your intestinal mucosa. In addition I would advise you for a stool test for ova and cyst and treat them if positive. If nothing helps, I would refer you to a gastro enterologist for a possible endoscopic examination of your colon, and also a possible ultrasound of the whole abdomen. Further management would depend on the reports of investigations. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing health care magic to clear doubts on your health problems. I wish you an early recovery. Dr Shareef.