The itchy anus may be caused by the following conditions: 1, perianal inflammation, most of which is due to the occlusion of the sweat glands of the skin, causing itching, pain, redness and swelling of the skin, followed by local macules or skin pimples and other skin diseases, often secondary to bacterial infection. 2, may be due to the itchy acromegaly caused by the acromegaly, which is located in the anus, the disease is highly contagious, and there will be a foreign body feeling, itching and pain. In addition, it may also be caused by anal fissures, perianal abscesses and other diseases. It is best to go to the hospital for a detailed examination, and after removing the primary cause, the symptoms will be relieved.