If there is pain in the anus and lower abdomen for a while, this condition appears, usually damage to the rectal mucosa or inflammation in the body, and the condition should be checked and treated actively as early as possible so as not to incur infection, and the patient should go to the anorectal department of the hospital in time. Paroxysmal pain in the anus or anal canal may be caused by a variety of reasons: 1, anal sphincter spasm pain and contraction will be caused during an acute attack of anal fissure, resulting in defecation or after defecation, temporary local anal pain. 2, during an acute attack, anal sinusitis will also be accompanied by varying degrees of anal canal pain, hemorrhoid pain is mostly seen in severe edema and blood in the stool, perianal abscess pain is more intense, or will affect the patient’s normal life, more walking, sitting, standing, while accompanied by systemic symptoms or even mild fever, different causes of local pain in the anus need symptomatic treatment.