Bloody stools, stomach discomfort

Blood in stool, if it is blood, it is considered as lower digestive tract diseases such as intestinal bleeding or intestinal lesions, hemorrhoids, anal fissure, etc. If the stool is black or brown, it indicates upper digestive tract bleeding or lesions, it is considered as oral or gastric bleeding or diseases with blood in stool accompanied by abdominal discomfort. Generally rule out hemorrhoids and anal fissure, and then distinguish the upper and lower digestive tracts according to the color of blood in stool and carry out relevant examinations.