The practice of boys accidentally inserting a sanitary rod into the anus may lead to the emergence of proctitis, prolapse, anal fissure and other diseases. 1. Proctitis: when boys insert the sanitary rod into the anus, if the action is rough it may lead to damage to the mucous membrane of the rectum, or even damage to the rectum, and the emergence of proctitis. It leads to abdominal pain, diarrhea, bloody stools and other symptoms. 2. Prolapse: Boys insert the sanitary rod into the anus, and if the action is rough or the sanitary rod is too thick when it is withdrawn, it may lead to prolapse of the anus, and in serious cases, the rectum will be partially dislodged, resulting in fecal incontinence and other symptoms. 3. Anal fissure: If the insertion of the sanitary rod is thicker or harder, it may cause the patient’s anus to tear and have anal fissure. Anal fissure will cause strong anal pain, and at the same time the patient will have the symptom of blood in the stool. Boys inserting the sanitary rod into the anus may also cause hemorrhoids, perianal inflammation and other diseases, so be careful. If there is any discomfort, seek medical attention.