What causes stomach pain and blood in stools?
Patient: Hi I have been having stomach pain on my left lower side and today have had a fishy smelly light yellow mucus when passing stools. I have had this on and off for the past year. i have had small amounts of blood in this mucus coming from my anus after just passing a stool. My stools vary between soft and very hard which is is pretty frequent. Doctor: Hi.Thanks for your query and an elucidate history.Your history is very classical:1 yearleft power pain fishy smelling mucus and blood in stool.changing bowel habit.I would advise you to undergo a colonoscopy as soon as possible along with ultrasonography to start with and then CT scan if required by your Gastroenterologist. Also needed are routine blood , urine tests; stool - routine, microscopy, staining for bacteria, AFB, cancer cells and  occult blood, All this will lead to a proper diagnosis whether this is due to ulcer/ polyp / malignancy or what.The treatment will be best and guided - step by step approach to give you the best results.