In spring, the body is active, the metabolism is accelerated, and the sebum secretion, which plays a role in moisturizing the skin, begins to gradually become vigorous, but the dry spring breeze reduces the humidity in the air, and the temperature rises, but “spring is warm but still cold”, and the weather in spring is hot and cold and unpredictable. Although the sun is not strong, the hours of sunlight begin to lengthen significantly. As the sunshine grows, ultraviolet radiation also increases, and the sky is filled with the fragrance of flowers and pollen. This is a time when people’s skin, after a winter, has just awakened from hibernation, pores quietly open, metabolism is active but not yet fully recovered, it is difficult to adapt to the vagaries of the climate, so it seems unusually delicate and sensitive, all the adverse external stimuli may trigger eczema. Acute eczema: The lesions are polymorphic, starting with diffuse flushing and later developing into papules, blisters, vesicles, oozing, crusting, and often multiple lesions coexist. The lesions are often flaky or diffuse, with no distinct boundaries. The lesions can be complicated by various parts of the body, but are more common on the head, face, distal extremities, and scrotum. The onset is often symmetrical and can be generalized in severe cases. The process is acute, with marked inflammation, a tendency to exude erosions, and a tendency to recur. Self-conscious burning and severe itching. Subacute eczema: a stage between acute and chronic eczema, often due to acute eczema is not treated in time or improperly treated, resulting in a migratory course of disease. The lesions are lighter than acute eczema, mainly papules, crusts, scales, only a small number of blisters and mild erosions. Chronic eczema: often due to improper treatment of acute and subacute eczema, long-term failure or repeated episodes of transformation. Due to the different sites, the clinical manifestations can vary slightly, but generally have the following characteristics: more confined to a certain area, the boundary is obvious, the inflammation is not heavy. The affected skin is thick and rough, with obvious crestal furrows and mossy changes. The color is maroon or brown, often with bran-like scales on the surface, with scratches, blood crust and pigmentation. The chronic course of the disease, sometimes light and sometimes heavy, irregular, often repeated acute or subacute attacks, especially when nervous. The onset of eczema, some only after the acute or subacute phase, a few weeks and cured, but generally often due to recurrent attacks, the phases can be crossed or exist at the same time. Therefore, the rash can be seen in different parts of the body at the same time. There are also a few patients who start out with acute eczema that is less obvious and manifest as subacute or even chronic eczema. If you are suffering from eczema, we should actively look for the cause, avoid further contact, prohibit alcohol and spicy stimulating food, reasonable rest, pay attention to skin hygiene, do not use hot water to wash the skin, do not use external stimulating anti-itch medicine. Actively treat systemic disorders. Desensitization treatment is to give allergens to the organism that has been sensitized by a certain substance (allergen) through different ways (injection, oral, topical, etc.), continuously, in small amounts, several times, so that the organism’s sensitivity is reduced, in order to reduce the possibility of reaction when encountering allergens again. This is done by starting with tiny doses and gradually increasing the dose through short intervals. However, not all patients or every allergen can be desensitized, so you need to carefully select the adaptive substances. Eczema prevention precautions: 1, do not bathe too diligently, usually 1-3 times a week, avoid scalding with hot water. 2, reduce sunlight exposure, apply sunscreen. 3, less use of scented cosmetics, can be selective application of medical skin care products. 4, avoid food as follows: vegetables: cilantro, parsley, leek, chili, garlic, coronary; meat: beef, lamb, dog, bird meat and its soup, eggs, a variety of seafood (fish, shrimp); spices: mustard oil, chili sauce, hot pot seasoning; alcohol: white wine, beer, wine, yellow wine (including mash) and a variety of drinks (including green tea); fruits: mango, pineapple and other parts of the tropical fruit. Strong tea, mung bean soup, milk (yogurt) are prohibited during medication. Minimize eating in restaurants.