The red color of the water at the bottom of the toilet after a bowel movement may be caused by blood in the stool. The cause of blood in the stool may be hemorrhoids. Having hemorrhoids can lead to symptoms such as blood in the stool, difficulty in defecation, and dry stool. 1. Blood in the stool may also be caused by fire, which is related to bacterial infection, and the patient may have gastrointestinal dysfunction. If you have blood in your stool, you should also consider whether you have a colon tumor or enteritis. 2, most blood in the stool is caused by hemorrhoids. If the blood in the stool is caused by hemorrhoids, you can use hemorrhoid cream. If the hemorrhoids are more serious, they can also be treated surgically. In the diet should pay attention not to eat too hard food, otherwise it will not be digested, defecation more difficult condition aggravated. If you have blood in your stool, you must pay attention to it and go to a regular hospital for an early examination to determine the cause and actively treat it.