Itching and falling pain in the anus are mostly considered to be caused by perianal skin diseases, perianal abscesses, hemorrhoids and other diseases. 1. Perianal skin diseases: such as anal eczema, etc., due to abnormal secretion of anal glands, stimulation of perianal skin, usually appear anal itching, falling pain and other uncomfortable symptoms. 2. Perianal abscess: the disease is a serious suppurative infectious disease, pus is difficult to flow out of the anus will stimulate the anus, the formation of swelling; such as outflow of pus to stimulate the skin will cause itching and other discomforts. 3. Hemorrhoids: repeated prolapse of hemorrhoidal nuclei, anal closure is not tight, the anal secretion outflow to stimulate the anus, further perianal itching, falling and other discomfort. It is recommended that if you have anal itching, falling pain and other uncomfortable symptoms, you should go to the hospital in a timely manner, improve the colonoscopy, anal fingerprinting and other tests to clarify the diagnosis, and further treatment, in accordance with the doctor’s instructions.