Intra-anal pain may be due to perianal abscess, sinusitis, anal fistula and other conditions. 1. Perianal abscess: the infection of this condition mostly originates from anal crypt infection, which can also be secondary to Crohn’s disease, tuberculosis, trauma, AIDS and so on. Diabetes mellitus, long-term oral hormonal drugs, blood diseases, etc., leading to low resistance, can also induce perianal abscess. Patients with submucosal abscess of rectum often have anal pain and symptoms, and some of them may also show pain in the anus. 2. Sinusitis: usually caused by bacterial infection, and also with frequent consumption of spicy, fried food. Generally, chronic sinusitis has no obvious symptoms or mild symptoms, some patients can appear in the anus symptoms of hidden pain, and can also be accompanied by anal tube falling feeling. Acute sinusitis patients pain is aggravated during defecation, stinging or tearing pain. 3. anal fistula: most of the anal fistula is due to rectal perianal abscess, but also secondary to perineal surgery due to infection, but also with bad habits, poor eating habits and other factors. Usually patients can appear secretion outflow, itching, fistula defecation, defecation and other symptoms, and fistula drainage is usually the case, there can be no pain or only slight swelling, if the external mouth healing, fistula blockage, there will be swelling or throbbing pain, can also be manifested as pain in the anus. It is recommended that patients with symptoms of intra-anal pain, according to their own symptoms, under the guidance of the doctor to clarify the cause of the disease and then give treatment, to avoid causing delays in the condition.