The pain inside the anus is relieved after farting, considering rectal polyps, perianal abscesses, hemorrhoids and other disease causes. 1. Rectal polyps: rectal polyps are elevated lesions on the surface of the rectal mucosa, long-term chronic inflammatory stimulation can lead to abnormal proliferation of the mucosa, when there is gas in the intestinal tract when the irritation is stronger, resulting in swelling and pain, after exhausting the swelling is relieved, the pain is relieved. 2. Perianal abscess: the occurrence of perianal abscess and anal gland obstruction, after the blockage of the anal glands, purulent infection will occur, perianal infection will stimulate intestinal peristalsis, intestinal gas will produce pressure on the anus, which produces obvious pain, gas discharge, anal sphincter relaxation, pain relief. 3. hemorrhoids: hemorrhoids are caused by engorged and enlarged veins in the anal canal or the lower end of the rectum, there will be pain in defecation, bleeding and other symptoms, there will also be a sense of anal swelling, intestinal gas will directly stimulate the anus, stimulating hemorrhoids aggravate the pain, the gas discharged after the pain in the anus will be relieved. The pain inside the anus is relieved after farting, there may be other reasons, it is recommended to go to the hospital for a detailed examination, a clear diagnosis, for the cause of the treatment given.