Patients are awakened by pain in the anus at night for the following reasons: 1. Perianal abscess: The main cause is likely to be perianal abscess, which is usually more severe at night during sleep, especially when there are more abscesses formed and greater tension, so they are often disturbed by severe pain during quiet, sleep or rest. In this case, you should go to the hospital in time to find the specific cause of the pain through the doctor’s rectal diagnosis and anoscopy, and then carry out a surgical treatment. 2. Other causes: Some inflammatory diseases of the anus and rectum, including proctitis and anal canalitis, can also cause pain, including some thrombosed external hemorrhoids that occur with rectal polyps, all of which may have more intense pain. In short, when this symptom occurs, you must go to the hospital in time to find the cause, and then carry out systematic and standardized treatment according to the cause.