Lead to white skin around the anus, and there are a variety of reasons for obvious itching symptoms, can be divided into the following categories: 1, perianal eczema triggered by itchy skin, perianal eczema symptoms, mainly due to the environment around the anus for a long time wet and the patient’s own endocrine dysfunction caused by the formation of pimples around the anus as well as the phenomenon of broken, which triggered the appearance of obvious itching symptoms around the anus. The skin oozes and turns white.2. Itchy skin caused by many reasons. This symptom does not have obvious skin lesions, just to itch mainly, occasionally accompanied by the phenomenon of whitish skin color, the main reason is the external environment and their own dietary stimulation. In addition to these reasons, intestinal parasitic infections and internal hemorrhoids can also trigger the appearance of this phenomenon.