1.What are the most common skin diseases in spring and how to prevent them? Spring is the season of growth, is the season of recovery, is the blooming of flowers is also a variety of insect breeding season, the first of several major skin diseases are allergies, such as seasonal dermatitis, urticaria, eczema, another is mainly due to insect bites caused by papular urticaria, the human body, especially infants and children if bedbugs, fleas and other bites, prone to allergic reactions, the rash generally 1 to 2 weeks to subside The rash generally resolves in 1 to 2 weeks and leaves temporary hyperpigmentation. The most common type of allergy is seasonal dermatitis, also known as seasonal contact dermatitis, mainly on the face, especially in young and middle-aged women, often related to pollen allergy and exposure to cosmetics, the performance is the facial erythema, papules, severe edema and blisters, there is more obvious burning and itching, can be accompanied by dryness and flaking. The second category is infectious skin diseases, such as viral infections caused by chickenpox, hand, foot and mouth disease, rubella, measles, etc.; bacterial infections such as folliculitis and acne. On the one hand, this is due to the dry and sandy spring, some air floats such as PM2.5 carrying viral bacteria contact opportunities increased, on the other hand, after the temperature rises, the human body’s sebaceous glands and sweat gland secretion increased without a corresponding increase in discharge function resulting in the possibility of infection. The third category is sun-based skin diseases, such as polymorphic sun rash and skin prone to tanning. The UV rays in spring are significantly stronger than in winter, and people wear less clothes and do not have the habit of trekking and sunbathing, which increases the exposure and the lack of protection against the less intense (compared to winter) sunlight in spring, and at the same time, people’s skin is still in the low UV environment in winter, and they do not adapt to this situation at once, which leads to inflammatory reactions outside the purple line. Prevention: People should try to avoid the wind and sun when they go out for activities such as trekking, if there is sun, it is best to wear a wide-brimmed hat, or use an umbrella to block cover, and apply sunscreen to avoid skin damage from UV rays. Friends with pollen allergies should try to avoid staying in places with dense pollen and do a good job of protection, such as wearing a mask, etc. When you get home, you should immediately wash your face and change your outside clothes to facilitate the removal of harmful substances. If itchy symptoms appear, it is best to wash your face with plenty of water to wash away pollen, dust and other allergenic substances, do not use hot water, alkaline soap and rough towels, do not abuse cosmetics, and pay attention to avoiding irritating foods, such as wine, chili, hot pot, etc. The actual fact is that you will be able to get rid of the problem by taking care of your personal hygiene, living a regular life, sleeping, and avoiding scratching. Once you find out that you have dermatitis do not dispose of it privately, but carry out treatment in time. The date, honey has a certain anti-allergy effect, allergic people can usually eat more appropriate. Carrots, tomatoes, peppers, kiwi, strawberries and other vitamin-rich vegetables and fruits also have a certain anti-allergic effect. 2.What are the symptoms of pollen allergy? What are the precautions and how to deal with them? Pollen allergy is the most common allergic skin disease in spring, the most common being seasonal dermatitis, in addition to hives and eczema. Seasonal dermatitis, also known as seasonal contact dermatitis, is mainly manifested on the face, especially in young and middle-aged women, and is often related to pollen allergy and exposure to cosmetics, manifested by facial erythema, papules, severe edema and blisters, etc., with more obvious burning and itching, which can be accompanied by dryness and flaking. Urticaria is mainly a single rash, with typical lesions of wind clusters that can subside within a short period of time, but quickly reappear with a new rash, recurring. Eczema, on the other hand, is a polymorphic rash, with erythema papulosum and blisters. Friends with pollen allergies should try to avoid staying in places with dense pollen, and do a good job of protection, such as wearing a mask, etc. When you get home, you should wash your face immediately and change your outside clothes to facilitate the removal of harmful substances. If itchy symptoms appear, it is best to wash your face with plenty of water to wash away pollen, dust and other allergenic substances, do not use hot water, alkaline soap and rough towels, do not abuse cosmetics, and pay attention to avoiding irritating foods, such as wine, chili, hot pot, etc. At the same time, pay attention to personal hygiene, to achieve a regular life, to ensure sleep, avoid scratching, generally can be recovered. Dates and honey have a certain anti-allergy effect, and people with allergies can usually eat more of them. Carrots, tomatoes, peppers, kiwis, strawberries and other vitamin-rich vegetables and fruits also have a certain anti-allergic effect. It is especially important to note that seasonal dermatitis that occurs on the face must be moisturized with the right additive-free and non-irritating moisturizer, which is very important for early recovery. Treatment: Once you are found to have dermatitis do not dispose of it privately. Try to go to a hospital to get assistance from a specialist to avoid personal misjudgment and delay in the condition, and self-treatment is not advocated. The principles of treatment are to remove and avoid re-exposure to allergens as much as possible, desensitization and symptomatic treatment according to the shape of the rash and the stage of the disease.