“Prevention is the main focus” is one of the basic policies of health work in China. For the prevention of skin diseases and other diseases, we must also implement the “prevention-oriented” policy and establish a holistic concept. Prevent the emphasis on treatment rather than prevention, the emphasis on local rather than overall and the emphasis on rare diseases, rare diseases and light on common diseases, multi-morbidity one-sided view. Since then, the majority of medical workers in China have done a lot of prevention work, and strive to popularize the scientific knowledge of prevention and treatment of scleroderma for all people. With the improvement of people’s living standard, patients with skin diseases, especially scleroderma, have higher requirements for treatment and prevention. Here we only briefly talk about some prevention principles. 1, keep the skin clean and hygienic: often keep the skin clean and hygienic, which has a certain significance to prevent the occurrence of skin diseases. Usually actively participate in sports activities and exercise, moderate sunbathing, can enhance physical fitness to maintain skin health, improve the skin’s ability to resist disease. 2, skin aging and light sex: avoid sun exposure, avoid eating photosensitive food and use photosensitive cosmetics, prohibit the use of photosensitive drugs; summer outings should play umbrella, exposed parts should be applied sunscreen, etc. 3, pigmentation: minimize the damage of ultraviolet light to the skin, should not be long-term use of skin harmful exfoliating agents or hormone preparations, avoid the use of poor quality cosmetics. At the same time should maintain a relaxed mood, regular life and adequate sleep. 4, cosmetic dermatology: before using a certain unused cosmetics, it is best to conduct patch test to help choose, do not blindly use a lot to avoid allergic reactions. Prohibit the use of poor quality or expired cosmetics, should not often heavy makeup, if indeed necessary, should also be cleaned when removing makeup. 5, due to excessive secretion of sebaceous glands: more common, such as acne, seborrheic dermatitis, etc., should mainly control the intake of fat, sugar, less spicy, fried food, often wash the affected area with warm water, avoid squeezing with hands. 6, pruritus: to actively look for the cause, advise patients not to scratch and external use of irritating drugs, do not use hot water to wash, prohibit alcohol, spicy stimulating food, to prevent aggravation and recurrence of skin disease. 7, infectious: for certain infectious skin diseases, such as scabies, leprosy, sexually transmitted diseases, pyoderma, fungal diseases, skin bacterial infections, etc., the discovery of infectious sources should be promptly isolated and treated to cut off the path of infection, early detection, early diagnosis, early treatment, to prevent contact infection. At the same time should do a good job of health promotion and education, hygiene and change of poor hygiene habits, to educate patients about the prevention of infectious and epidemic skin disease knowledge. 8, allergic reactions: allergens should be carefully searched for, to avoid re-exposure or re-intake; prohibit the relevant allergenic drugs, including adult drugs or compound drugs containing allergenic drug components; avoid the use of allergic protein food prone to allergic reactions, such as fish, shrimp, crab, eggs, etc.; unused cosmetics should first be a small area trial, such as allergic performance, should immediately stop using, do not use reluctantly; for chronic urticaria For chronic urticaria and other skin diseases of more complex etiology should be carefully searched for allergens, and try to remove. 9, occupational: to carry out the investigation of the pathogenic factors in the work environment, the work exposure to chemical, physical and biological factors that may cause disease, should carefully understand the mode of exposure, work and process flow, and the interrelationship with disease. Occupational skin diseases should be protected by discovering the cause of the disease, improving the process flow and working conditions as much as possible. Workers should also be instructed to understand the knowledge of occupational skin diseases and do personal protection. 10. Skin tumors: Avoid sun exposure, excessive sunburn can induce skin tumors. Avoid the use of chemicals that may cause cancer, do not smoke, regular medical checkups or timely consultation for early detection and treatment of skin abnormalities. 11.Psychotherapy: Psychotherapy can be divided into reasoning therapy and behavioral therapy. The reasoning treatment is to use psychoanalysis, such as talking, to inspire the patient to transform the psychological conflicts repressed in the “subconscious” into something conscious, and to express all thoughts, experiences and the onset of the disease freely, so as to achieve the purpose of treatment. Behavioral therapy includes relaxation therapy, systematic desensitization therapy, and biofeedback therapy. Clinically, some persistent skin diseases, such as psoriasis, acne, and chronic urticaria, have been improved to varying degrees through psychotherapy.