Red pain around the anus is considered to be due to eczema, perianal inflammation, trauma, rectal inflammation and other causes, the specific situation should also go to the hospital in time for examination and diagnosis. 1. Eczema: is due to a variety of factors cause the skin around the anus appear pimples, blisters, rot and accompanied by intense itching inflammatory disease, which can be manifested as the symptoms of anal redness, swelling and pain. 2. Perianal inflammation: when the perianal skin infection caused by local skin redness, edema and accompanied by pain symptoms, in severe cases may cause local skin decay, ulcers or the formation of fistulas, which can be manifested as symptoms of perianal redness and pain. 3. Trauma: If the body falls or external forces hit the anus, so that the local skin damage, can lead to perianal redness, swelling and pain, and sometimes pus infection symptoms. 4. Rectal inflammation: when the body is infected by microorganisms, as well as autoimmune system disorders caused by rectal inflammation, which can lead to redness, swelling and pain around the anus, increased frequency of stools, mucus, pus and blood stools and other symptoms. When the above symptoms occur, it is recommended that patients go to the hospital in a timely manner, under the guidance of professional doctors, as soon as possible to carry out reasonable standardized treatment.