The cause of blood in stool in the morning may be caused by bleeding hemorrhoids, rectal tumors, enteritis and other reasons. 1. Bleeding hemorrhoids: If the patient suffers from hemorrhoids, the bleeding hemorrhoids may be caused by dry stool or straining to defecate, etc. The blood of bleeding hemorrhoids is usually in bright red color, and the blood may stick on the surface of stool when defecating, or there is blood dripping from the anus after the patient defecates or there is blood on the paper when wiping the buttocks. 2. Rectal tumor: For example, rectal cancer, rectal adenoma and other diseases can easily cause patients to bleed during defecation, and this kind of blood is usually dark red, and the blood and stools are mixed together, and often accompanied by changes in the shape of the stools and defecation habits, for example, the stools become thin, not shaped, and the stools have spikes, and so on. 3. Intestinal inflammation: Usually the common inflammation of the colon is ulcerative colitis, which is mucus, pus and blood in the stool, and the stool may be relieved 3-4 times a day, and the stool is with mucus and pus, accompanied by abdominal pain. In addition, if the blood in the stool is frequent and the situation is getting more and more serious, it is recommended that the patient consult a doctor for timely examination, and under the guidance of the doctor for appropriate treatment.