”Hot weather, itchy buttocks …..” Some people always unconsciously scratch their buttocks, and this indecent action is very ruinous to the image. “There is no shortage of outpatients itching for more than ten or twenty years, the skin around the anus is scratched, the majority of patients are elderly, young people also have. It is important to note that there are many diseases that cause perianal itching, anal fistula, rectal inflammation, anal sinusitis, perianal eczema, neurodermatitis, infection caused by bacteria, mold or parasites (pinworms), kidney failure, diabetes, etc. may trigger, and poor hygiene, buttocks often in a warm and humid environment, underwear not dried, diet intolerance and psychosomatic factors may also become perianal Itching can also be a cause of perianal itching. The actual itchy symptoms of the perianal area should not be taken for granted as eczema, but should be promptly investigated by a doctor. The anal itch is characterized by intense and long-lasting itching, especially at night or in humid environments, which seriously affects the normal life of patients. When itching is severe, the local skin of the anus may also show scratches, blood scabs, pigmentation, mossy sclerosis and even secondary infection due to scratching. Perianal itching is caused by damage to the nerve endings of the skin, so although the itching at the anus is unbearable, the naked eye cannot see anything different. Patients should be seen in a hospital, and it is recommended that they first consult an anal surgeon. Perianal itching is not difficult to treat, and it is crucial for patients to identify the cause, make a clear diagnosis and treat the cause. Therefore, patients must seek medical attention in a timely manner after discovering the condition, cooperate with the doctor to do local and systemic examinations, through the doctor’s naked eye, anal finger examination, anoscopy and, if necessary, relevant parasitological examinations, and never blindly use medication without understanding the situation. As far as perianal skin diseases are concerned, perianal eczema, neurodermatitis, ringworm, various warts, venereal diseases, sweat gland inflammation and other skin diseases can cause anal itching, the most common of which is perianal eczema. Perianal eczema mainly manifests itself as skin damage such as papules, blisters, or even vesicles and oozing in a circle around the anus, often causing thickening and mossiness of the skin around the anus due to intense itching and scratching, with the appearance mostly turning grayish white. “The most common patient is due to intestinal mucus or a small amount of fecal matter spilled onto the perianal skin, which is not scrubbed in time, thus stimulating the perianal skin and causing eczema.” Director Shi Zhang Shi said, for perianal eczema, should be used after the stool with a wet cotton ball to clean the perianal area, and then gently dry, with a drug-free disinfectant talcum powder moisture, a small cotton ball will be loosely placed on the anal edge can be kept fresh, the more serious patients must be anti-allergy treatment. If the perianal skin itching is caused by fungus, it is necessary to take off skin debris to find fungal spores under the microscope, after the diagnosis can be taken to apply local antifungal drugs, serious cases or combined with other parts of the fungal infection can be used at the same time intravenous systemic drugs. If you have a history of impure sexual intercourse, you must go to the dermatology department of a regular hospital, because sexually transmitted diseases such as condyloma acuminata and AIDS can also cause perianal and vulvar itching, so you must not delay diagnosis and treatment. Chinese herbal lotion for itching Bitter ginseng 60 grams, snake bed seed 15 grams, ground skin 15 grams, white moss bark 15 grams, Sichuan pepper 15 grams, yellow cypress 15 grams, yellow cypress 15 grams, rhubarb 10 grams, alum 15 grams, water decoction after fumigation, sit in the bath, twice a day, about a week to relieve symptoms. Those who have obvious skin thickening and then with peach kernel 10 grams, safflower 6 grams, red peony 12 grams and so on have better effect. If long-term treatment is ineffective, or recurrent, drug injections or surgery can be used, with good results. Perianal pruritus has a long treatment cycle and must not be considered cured until the local skin damage is completely normal, otherwise the chances of recurrence are high.