<s>[INST] I have been getting lower abdominal pain that occurs mainly on the left side and middle. It comes every so often, off and on. The pain is excruciating and it won t go away until I go to the restroom. Usually I have diarrhea , with the occasional accompaniment of blood . Sometimes the pain hurts so bad that it leaves me feeling light-headed and physically weak. I have taken an ultrasound test, a stool test, and a colonoscopy. It has been concluded that I have a hemorrhoid which explains the blood in the stool, but the pain still comes and there has been no results of what is causing the pain. [/INST] Hi,thanks for query.You might have acid peptic disease,which can lead to all this problems and still all the reports are normal.Another possibility is Irritable bowel syndrome,in this again all the test are normal and you can frequent abdominal pain with off and on diarrhea.This has got strong association with your mental state,means any major alteration in mood can increase the problem.The treatment is largely symptomatic  and relaxation technique for stress.bye. </s>