As the largest organ of the human body, the skin plays a huge role on the surface of the body. It can be said to be the first line of protection for human beings. External bacteria, viruses and fungi have to pass through the broken skin in order to harm the internal organs of human beings. As the saying goes, a thousand miles of dike is destroyed by an anthill, protecting the skin is a very important thing. What does the skin fear most? We say that skin diseases have “four fears”. Washing, burning, scratching, and sunlight. These four points are often the most inattentive or favorite things to do for patients and friends. 1, wash Mostly from people’s incorrect understanding to. Most people think that skin disease due to dirty, wash will reduce the disease, in fact, this is a very wrong understanding. Bathing regularly, will destroy the barrier function of the surface of the body. Many people have the feeling that the more you wash the drier the skin, thus aggravating the itchy feeling and causing the condition to worsen. 2, hot Originated from people’s desire for temporary symptom control. Outpatients often reflect the way to deal with itching. In fact, hot can then control the symptoms, after the itching will be more intense. 3, scratching is the longest action people do. Scratching can make the skin more hypertrophic. 4, sun protection is considered to be the sole preserve of women. In fact, sunlight caused by photoaging, caused too many diseases. At the same time, it is a factor that aggravates many diseases. We hope that all patients will try their best to avoid the above-mentioned wrong habits in their daily life.