Perianal broken a little old can not be repaired, may be anal fissure, perianal eczema, AIDS and other causes. 1. Anal fissure: If you have anal fissure, due to frequent secretion overflow, the broken place has been in the humid environment, can cause perianal broken a little old can not be repaired. 2. Perianal eczema: If you suffer from perianal eczema, it can cause localized inflammatory reaction, so that the broken place can not be repaired normally. 3. AIDS: If you suffer from AIDS, the lowering of the immune function will prolong the repair time of the broken place and even prevent it from being repaired. Perianal broken a little old can not repair the crowd, there may be other causes, it is recommended to go to the hospital in a timely manner, a clear cause, under the guidance of a professional doctor for standardized treatment, so as not to delay the condition. Follow the doctor’s instructions.