Anal contraction pain may be caused by anal fissures, hemorrhoids, sinusitis, perianal abscesses, etc., as follows: First, anal fissures: anal fissures are located in the anal canal, and when the patient contracts the anus will stimulate the fissure and produce painful symptoms. Second, hemorrhoids: when the nucleus of the hemorrhoid appears thrombosis or edema, contraction of the anus will also squeeze the nucleus of the hemorrhoid, resulting in painful symptoms when contracted. Third, anal sinusitis: the anal sinus is located in the dentate line, when it is infected, the anal sinus will appear inflammatory edema, or even the formation of abscesses, when the contraction of the anus will also squeeze the anal sinus, resulting in painful symptoms in the anus. Fourth, perianal abscess: it belongs to the purulent infection disease, when the contraction of the anus will stimulate the perianal abscess and produce pain symptoms. The specific patient must go to the hospital and do the relevant examination to make a clear diagnosis before taking the corresponding treatment measures.