Hi. Thanks for your query. Noted the history and understood your concerns. Pain in the upper abdomen with fluffy stool almost 5 times a day and loosing 16 lbs in 4 months indicates the following: Enterocolitis meaning infection or inflammation of the intestinal tract due to some disease or disorder that needs further proper investigations. Another reason can be chronic pancreatitis. I would advise you the following in such a situation: MRCP or contrast enhanced CT scan of the abdomen. Blood tests for CBC, liver and pancreatic functions, thyroid function and for diabetes . Tests of stool for three consecutive days. Upper GI Endoscopy. Colonoscopy. Get the treatment as per the clinical evaluation, examination and investigations reports. You may need the following: Pancreatic enzyme supplements to be taken with food. A course of an antibiotic, metronidazole if infection is found. Probiotics, multivitamins in therapeutic dosages.