Proctitis can be detected by physical examination, laboratory tests, imaging tests and colonoscopy. 1. Physical examination: Doctors will understand the situation around the anus and rectum through rectal fingerprinting, which is conducive to the diagnosis of the cause of the disease. 2. Laboratory examination: Laboratory examination mainly includes blood routine and stool routine. Blood routine can determine whether the patient is infected; stool routine can understand whether the patient has infection and digestive bleeding. 3. Imaging examination: Imaging examination mainly includes barium meal enema angiography, which can know the site of intestinal stenosis and whether there is a fistula, CT or MRI, which can assess whether there is a primary tumor and the degree of radioactive damage to the rectum. 4. Enteroscopy: proctitis will appear local mucosal edema, congestion and other inflammatory reactions, through the enteroscopy can understand the degree of rectal lesions, but also can clearly diagnose the condition. The symptoms of proctitis should be actively seeking medical examination, in order to clearly diagnose the condition, and standardized treatment under the guidance of the doctor, in order to reduce clinical symptoms.