Feeling a little itchy at the anal opening is relatively common in clinical practice. If there is no accurate determination of the cause of the disease, and blindly carry out treatment, not only can not relieve the symptoms of the disease, but will aggravate the development of the disease, the common causes of anal itching, there are the following: perianal pruritus, perianal pruritus itself is a disease, and is not a symptom, is due to the local itching discomfort caused by the overproduction of anal glands. Generally, the use of heat-clearing and damp-drying herbs for local fumigation, or potassium permanganate powder fumigation, its effect is better. The presence of a large number of external hemorrhoids around the anus can also lead to a distinct foreign body feeling, which can cause itching, scratching, aggravation and development.