“Hot weather, itchy butt …..” Some people will always unconsciously scratch the buttocks eye, this indecent action is very ruined image. Experts pointed out that many times scratching the buttocks is not a habit, probably because of perianal itching (i.e., anal skin itching). “Clinic not lack of itchy ten or twenty years of patients, perianal skin are scratched, patients to the elderly majority, young people also have.” It is important to pay attention to the fact that there are many diseases that cause perianal itching, anal fistula, rectal inflammation, sinusitis, perianal eczema, neurodermatitis, infections caused by bacteria, mycobacteria, or parasites (pinworms), renal failure, diabetes, etc. may be triggered by poor hygiene, buttocks are often in a warm and humid environment, underwear is not sun-drying, dietary intolerance, and psychosomatic factors may also become a perianal Itching can also be a trigger for perianal itching. Itchy anus first find out the cause of the disease and then treatment According to reports, anal itching is characterized by itching intense and long duration, especially at night or in a humid environment, itching is more, seriously affecting the normal life of patients. When itching is serious, the local skin of the anus due to scratching will also appear scratches, scabs, hyperpigmentation, moss-like sclerosis and even secondary infection. Perianal itching is triggered by damage to the skin nerve endings, so although the patient’s anus is itchy, the naked eye can not see any difference. The patient should go to the hospital and it is recommended to consult anorectal surgery first. Perianal itching is not difficult to treat, the key to identify the cause of the patient, a clear diagnosis, the cause of treatment. Therefore, patients in the discovery of the condition must be timely medical treatment, with the doctor to do local and systemic examination, through the doctor’s naked eye, anal finger test, anoscopy, if necessary, but also to do the relevant parasitological examination, do not blindly use medication in the absence of understanding. As far as perianal skin diseases are concerned, perianal eczema, neurodermatitis, ringworm, various kinds of warts, venereal diseases, sweat gland and other skin diseases can trigger anal itching. Perianal eczema is mainly manifested as a circle around the anus appear pimples, blisters, and even vesicles oozing and other skin damage, often due to intense itching after scratching and causing perianal skin thickening, mossy, most of the appearance of the grayish-white. The most common patient is due to intestinal mucus or a small amount of fecal overflow to the perianal skin, not timely scrubbing, which stimulates the perianal skin caused by eczema. For perianal eczema, should be in the stool with a wet cotton ball to clean the perianal area, and then gently dry, with a drug-free disinfection of talcum powder moisture, will be a small cotton ball loose loose placed in the anal rim can be kept refreshing, the condition of the more serious patients shall be anti-allergy treatment. If the perianal skin itching caused by fungi, it is necessary to take off the skin debris under the microscope to find fungal spores, after diagnosis can be taken to the local application of antifungal drugs, serious or combined with other parts of the fungal infections can be at the same time intravenous systemic medication. If there is a history of unclean sexual intercourse, you must go to the regular hospital dermatology, because sexually transmitted diseases such as condyloma acuminatum, AIDS, etc. can also cause perianal and vulvar itching, must not delay diagnosis and treatment. Perianal itching may also be a sign of kidney failure, cancer In addition, anorectal diseases such as hemorrhoids, anal fissure, anal fistula, anal sinusitis, anal papillitis, rectal prolapse, anal incontinence, etc., resulting in increased secretions at the anal opening, moist stimulation of the skin and thus cause itching. Perianal itching should not be underestimated there is an important reason, that is, chronic kidney disease, renal failure, abnormal liver function, diabetes mellitus, gout and other systemic diseases can cause anal itching, as well as in recent years found in the age of 60 years old and above, some of the anal canal and perianal malignant tumors, one of the initial symptoms of perianal itching. If the skin or patches around the anus are hard, or ulcers are formed, and accompanied by itching, or even bleeding, pain, discharge, etc., we should be alert to the possibility of cancer. Of course, the final diagnosis of perianal tumor should go to the hospital to find a specialist to do anal fingerprinting and pathological biopsy. Prevention of perianal itching from daily details perianal itching attack will be itchy, patients work during the day, the attention is distracted, do not notice the itch, to the evening quiet down, itching is particularly obvious, many patients woke up from the itching in their sleep, can not sleep at night. Summer weather is hot, the public to prevent perianal itching to pay attention to daily details. 1, weekdays to keep the anus dry and clean, after each bowel movement it is best to scrub the anus with water. And as far as possible to wash the anus once a night. Wash the perianal area with warm water. Generally do not use soap, especially can not use alkaline soap. Cleaning towels, washbasin, etc. should be used exclusively to avoid cross-infection. 2, underwear to choose breathable loose material, and to wash and change, in the sun sterilization. Itchy people do not wear tight, too hard pants. 3, do not sit for a long time on hot days, especially wear jeans to pay attention to. It is recommended to work for an hour or two to stand up and pat the buttocks, relaxation. 4, eat more vegetables and fruits, do not eat or eat less stimulating food, such as chili, strong tea, coffee, high alcohol. Allergic people should eat less allergic food, such as fish, shrimp, etc., to avoid contact with allergy-causing chemicals. 5, to actively treat those diseases that can cause anal itching, such as diabetes, chronic kidney disease, liver function abnormalities. 6, pay attention to the combination of work and rest, maintain a happy mood, to prevent excessive tension and anxiety, do not scratch the anus, do not use too hard items to rub the anus.