following medical conditions and diseases can be cause pain in abdomen and bleeding in stool. Hemorrhoids. These are probably the most common cause of visible blood in the lower digestive tract, especially blood that appears bright red. Hemorrhoids are enlarged veins in the anal area that can rupture and produce blood, which can show up in the toilet or on toilet paper. Anal fissures. Tears in the lining of the anus can also cause bleeding. These are often very painful. Colon polyps. These are growths that can happen in the colon. Some can turn into cancer over time. Colorectal cancer can also cause bleeding. Intestinal infections. Inflammation and bloody diarrhea can result from intestinal infections. Ischemic colitis. This means that not enough oxygen is getting to the cells that line the intestine. Bloody diarrhea, often accompanied by belly pain, can happen if not enough blood gets to the intestine, which results in ischemia, or insufficient oxygen, and damage to cells lining the intestine. Diverticular disease is caused by diverticula -- little “pouches” that bump out from the colon wall. Ulcerative colitis. Inflammation and extensive surface bleeding from tiny ulcerations can be the reason for blood showing up in the stool. Crohn s disease is an immune system condition. It causes inflammation and can result in rectal bleeding. if,reports are normal then don t worry about and infection and maintain balance diet,avoid spicy and oily foods .take fibres rich diet and drink plenty of fluid.try to avoid constipation.