Hi and welcome to HCM. Most common causes of blod in stool are benign and you shouldnt be concerned. I dont know your age,but usually bleeding is caused by hemorrhoids, fisures, angiodysplasia or polyps. SOme other more serious diseases must always be ruled out. SO I suggest to visit proctologist who can do rectal examination and decide is colonoscopy necessary.Also you should do red cells count to see is there any sign of anaemia. Try to eat easily digestible food such as fruit,green, milk products and boiled food. And take enough fluids. Nothing serious can happen in short time but visit specialist as soon as you can. WIsh you good health.