Anal cramps are spasms of the anal sphincter, which are mainly caused by the stimulation of infectious lesions in the rectum and perianal area. 1. Inflammation of the rectum, when there is proctitis, due to inflammation stimulation to the sphincter muscle, resulting in the anus showing contraction of the state, manifested as anal cramps phenomenon. 2. Perianal infectious diseases, including perianal abscess, anal fissure and anal fistula and other diseases, the perianal muscles are stimulated by lesions, and then the symptoms of cramps. If this symptom exists for a long time, it can lead to the gradual narrowing of the anus, which in turn causes difficulty in discharging stools, and may cause pain. It is recommended that the symptoms of anal cramps should be promptly consulted in a regular hospital under the guidance of a professional physician to conduct a relevant examination, to identify the cause of the disease and carry out targeted treatment to avoid aggravation of the condition.