The red residue in the stool may be caused by food or drug factors, and generally does not require special treatment. However, it may also be caused by disease factors related to gastrointestinal bleeding, often requiring causal treatment. 1, food factors or drug factors: affected by food factors, can lead to red residue mixed in the stool, or stool color black, more common foods are red dragon fruit, tomatoes, blueberries, chocolate, pig liver, animal blood products, etc.. Drug factors often refer to patients taking drugs such as sodium salicylate, rifampin, etc., which may cause the stool to become red in color, and iron supplements may also cause the stool color to change. These food factors and drug factors cause stool color change is a transient phenomenon, do not need to worry too much, stop the relevant drugs and food, this symptom can disappear; 2, disease factors: such as hemorrhoids, anal fissures, dysentery, ulcerative enteritis, intestinal overlap, intestinal cancer and other reasons, due to disease can cause gastrointestinal bleeding, and in the bowel movement when the stool is dry, the stool will be mixed with red residue. Patients with mild hemorrhoids and anal fissures can be treated in a conservative manner, such as taking a sitz bath with potassium permanganate solution, adjusting their diet, and avoiding stimulating foods, which can ease their symptoms. Dysentery requires antibiotics such as amoxicillin and norfloxacin capsules. Ulcerative enteritis can be treated with drugs such as omeprazole, while intestinal entrapment and intestinal cancer are generally recommended to be treated surgically, with chemotherapy and radiotherapy if necessary. In addition, if the symptoms of red residue in the stool for a longer period of time, you should promptly go to the hospital to check the stool routine and other tests to clarify the cause and then target treatment to avoid delaying the disease.