In recent times, the temperature continues to fall, into the cold winter, the hospital outpatient itchy skin patients increased significantly, a typical case: “doctor, since the weather turned cold my skin is very itchy every day, the day is fine but at night when you get home is very itchy, see what rash, every time you change clothes, you seem to see some tiny white skin scales followed by shedding. I wash every day with hot water soap, but the more I wash, the more itchy, itchy people want to scratch, until the scratch marks blood stains to give up.” By the way, the above description is typical of pruritus. As the name implies, this is an itchy skin disease. People may wonder: many skin diseases itch, so does this disease cover all pruritic skin diseases? The answer is no. Pruritus in dermatology refers to skin diseases that do not have a primary rash but only itching. In layman’s terms, the patient’s skin should look completely normal from the outside and just feel itchy. Pruritus can occur for a number of reasons, from external factors such as cold and heat irritation and rough clothing to internal factors such as diabetes, liver and kidney disease and psychological factors. Pruritus is usually not serious at first, and may be confined to one place at first, but gradually it may become unbearably itchy and scratch too hard, leading to skin inflammation and scratching, causing eczema, flaking, thinning of the skin, and even bacterial infection, often with paroxysmal attacks that affect sleep. Itchy skin occurs mostly on the inner thighs, the extensor side of the calf and around the joints. It is common in the elderly, and is also easy to occur in people with dry skin type and often after bathing. For the above described symptoms related to pruritus, it can be seen that the winter protection of the skin is urgent. The corresponding measures are mainly the following: first of all, do not appear itchy to scratch, usually to contact water or detergent, wear gloves, do not take a bath too often, the water is not too hot, so that the air in the house as humid as possible; secondly, bathing should not use soap and other degreasing effect of strong detergents, avoid rubbing, after bathing the whole body coated with moisturizing cream can protect the skin; and avoid spicy and irritating food, life as far as possible to reduce If necessary, drugs can be used to stop itching, such as topical application of mint aluminum acetate, compound camphor spirit, etc. If itching seriously affects sleep and daily life, it is recommended to go to the hospital as soon as possible; those who have corresponding complications should use drugs under the guidance of doctors.