I am suffering from blood coming out of my stool. it has been 3 months. blood comes out once or twice in a month. i m male of age 18. please , help me.

Get an evaluation.: It isn't normal to have blood in the stool. While there are some explanations that are less serious, i.e., hemorrhoids or fissures, there are some more serious reasons as well. I am guessing you will be advised to have a colonoscopy to rule out colon cancer (unlikely, given your age - but not impossible), ulcerative colitis, crohn's disease, or a number of other causes. Don't worry; get checked!