For anal itching, many patients believe that this is caused by perianal unclean, so blindly wash and change underwear and anus diligently, powerful time is with boiling water scalding, but these can only stop a moment of itching, and after the itching continues, and many patients often to the pharmacy to take many drugs to apply, but still does not work, in fact, anal itching is not only caused by perianal unclean, there are many diseases can cause anal The itchy anus. The “culprits” that cause anal itching 1, contact factors: usually due to the patient consumed some irritating food, such as seafood, too spicy food. In addition, if the contact is triggered by allergic drugs, chemicals, etc., may also induce anal itching. 2, disease factors: disease induced anal itching symptoms, generally have a continuous itching situation, and when the symptoms of itching, not only around the anus prone to itching, but also prone to the spread of itching. For hemorrhoids, anal fistula and other more common diseases caused by the itching symptoms, should be treated from the root cause in order to achieve a cure for itching. 3, parasites: many patients said that the symptoms of anal itching will be particularly obvious at night, when the symptoms appear, like a bug crawling bite. This condition is usually caused by some of the more common parasitic diseases. The reason why the itchy symptoms are obvious at night, this is mainly because the parasite stimulated the end nerve of the anal canal, so the itchy situation is more serious. 4, clothing texture factors: if you wear tight-fitting clothing for a long time or underwear is not strong sweat-absorbing function, it will also cause itching around the anus. How to prevent anal itching? 1, underwear should be comfortable: it is appropriate to wear pure cotton loose, do not wear uncomfortable texture or thick and rough underwear. The underwear should not be too tight, too hard, and should be diligently changed and washed, to give the anus a comfortable and clean environment to reduce infection. 2, maintain anal hygiene: as far as possible every night with warm water to wash once, with soft tissue gently dry, so that the anus clean and dry. The towel and basin used for cleaning should be dedicated to prevent cross-infection. The skin around the anus should not be damaged by using alkaline soap. 3, pay attention to a reasonable diet: eat more fiber-rich vegetables and fruits, eat less or no chili, coffee, highly alcoholic and other stimulating foods, allergic people eat less allergy-prone food, avoid contact with allergy-inducing chemicals.