After the winter, spring returns to the earth, everything revives and is full of vitality, unbeknownst to us, annoying skin diseases also come quietly, it can be said that “skin diseases know the season, when spring is happening”. Whenever spring comes, the skin, especially the face, will be dry, red spots, papules, peeling, accompanied by varying degrees of itching, severe sneezing, itchy eyes and nose or coughing, and usually like two people, in fact, is suffering from allergic dermatitis. In the spring, atopic dermatitis is also known as “peach fungus”, and in severe cases, it is really a case of “I don’t know where my face is going, but the peach blossoms are still smiling”. So, what exactly is atopic dermatitis and why does it “love it in the spring”? Allergic dermatitis, also known as allergic dermatitis, is an inflammatory skin reaction caused by allergens through the mechanism of allergic reactions, associated with a variety of factors, manifested as erythema, papules, scales, and even edema on the face to the whole body, often accompanied by itching or tingling, recurring every year. It usually occurs in allergic patients, and intrinsic allergic factors play a leading role in the development of the disease. In addition, chronic digestive diseases, mental stress, insomnia, excessive fatigue, internal foci of infection, endocrine and metabolic disorders, etc., can trigger or aggravate the disease. There are also many external factors, including diet, inhalants, climate, environment, etc. This most common disease in dermatology is becoming more and more prevalent with modern industrialization, changes in the living environment and increased air pollution, with increasing exposure to allergens. Spring has become an important time for allergic dermatitis because of its climate change and its own characteristics. The following is a list of the “seven deadly sins” of spring allergies. First of all, the sin of powder, spring flowers, pollen, willow, dust and bacteria in the air with the gusts of spring breeze fluttering everywhere, as people breathe and the metabolism of the skin become allergens. Spring dry and rainy season alternately, these dust in the wind and rain baptism, increasing the opportunity to contact with human skin, it is easy to produce allergies, the skin can appear hives, facial reoccurring dermatitis, itching and other symptoms. Secondly, the sin of light, spring is the most beautiful season in the four seasons, spring bright season is the best time to tread the green excursion. However, the lowest UV content in the winter sunlight, to the sudden rise in UV content at the onset of spring, it is difficult for people to adapt, once exposed to strong UV radiation, can cause skin damage and photosensitive dermatitis. In addition, spring people love to eat wild vegetables such as water chestnuts, marjoram, amaranth, amaranth, spinach and celery and other food containing photosensitive substances, after eating easily induced photosensitive dermatitis. Again, the sin of makeup, facial skin in the spring becomes sometimes dry when oil, easy to flake, so that the natural barrier of facial skin is damaged, it is easy to produce allergic reactions to external substances. Spring outdoor activities increase, people use more cosmetics, toiletries and patronage of beauty salons, contact with a variety of chemical substances, on the one hand, the facial skin becomes delicate and lose the protection of sebaceous film, naturally easier than the average person allergic, on the other hand, some substances are allergens themselves can directly cause allergies. Fourth, the sin of food, spring is a time of renewal, rich in products, people love to eat spring bamboo shoots and other foods, but spring bamboo shoots contain insoluble oxalic acid, too much consumption is easy to induce asthma, allergic rhinitis and dermatitis, etc.. Spring bamboo shoots and sea fish and other allergy-prone food together will also aggravate the symptoms, in addition to the aforementioned light-sensitive foods like celery intake and light exposure can appear photosensitive. Fifth, the sin of insects, spring hair follicles began to recover egg laying, part of the people due to increased oil secretion, for hair follicle reproduction and allergy provides the conditions, naturally in this season is easy to occur hair follicle dermatitis. Sixth, the sin of chaos, the spring climate is pleasant, more kinds of social activities such as graduation, job hunting, examinations, meetings come into being, as the pace of life and work accelerates, the competitiveness increases, people’s stress increases, diet and life is not regular, resulting in immune dysfunction, it is easy to allergic to external substances, allergic skin diseases such as self-sensitivity dermatitis. Seventh, the sin of man, allergic dermatitis is ultimately good for allergic people, people with a history of hereditary allergies, a family history, often accompanied by asthma, allergic rhinitis, the onset and dry skin, reduced barrier function and other related, easy to react to a variety of allergens, this group of people in the spring bear the brunt of the incidence of higher than normal people. So how to deal with atopic dermatitis scientifically when spring comes? For pollen allergy, we need to reduce the chance of going out, wear glasses mask when going out, wash the exposed skin in time after going home, close the doors and windows during the day, do not dry clothes outside, etc. For some known pollen or inhalation allergens, once detected, immediately transfer the patient’s living environment. For ultraviolet rays, try to find photosensitive substances and avoid contact or consumption, such as mud snail, amaranth, shepherd’s purse, lettuce, horsetail and other foods eaten sparingly is better, followed by avoiding light, wearing white wide-brimmed hats when going out, or can use anti-UV sunshades and sunscreen, preferably using sunscreen with PA++ and SPF15 or more, which can protect the skin from sun exposure. For makeup beauty, should stop using poor quality aromatic cosmetics, sensitive skin in the use of high concentration of cosmetics, should be first in a small local trial or dilute it half before use, not suitable for exfoliation and other therapeutic too strong products, sensitive skin epidermis layer is thin, after good basic care to pay attention to the use of sunscreen products, products should be breathable, permeable, can use some creams, lotions and gel-like care products The skin care products that are suitable for moderate amount of oil in winter are not applicable in spring. For food, in addition to avoid eating eggs, milk, fish, shrimp, seafood, spicy and stimulating food, we should also be alert to spring seasonal foods such as spring bamboo shoots, wild vegetables, mangoes, pineapples, strawberries, etc. On the other hand, some anti-allergy foods such as honey, dates, enoki mushrooms, carrots, barley, yogurt, etc. can regulate the immune system and appropriate supplementation can help improve allergies. For hair follicles, in order to avoid providing an environment for their growth, we need to improve the state of excessive facial oil secretion, eat more fruits and vegetables, less greasy food, careful use of cosmetics and facial topical drugs, and good facial cleaning and care. For immune disorders, we need to live a regular life, physical and mental health, balanced diet, sufficient sleep, happy spirit, appropriate exercise, enhance physical fitness, correct bad habits, and improve the original underlying disease. For allergic constitution, although genetic factors lead to no complete solution, we should still actively look for allergens, avoid potential aggravating factors, dress in loose and soft cotton products, pay attention to skin moisturizing, learn to manage their emotions, control their scratching behavior, so as not to cause itching – scratching – itching vicious circle, should not hot water, should not use alkaline soap to wash, so as not to irritate the skin. It should not be washed with hot water or alkaline soap to avoid stimulating the skin and aggravating the condition. If you are suffering from allergic dermatitis in the spring, the condition will heal itself in a few days if it is light, if the symptoms are heavy, you should go to the hospital in time under the guidance of a doctor, depending on the condition of the oral medication and topical medication, do not blindly apply some drugs or use a prescription without knowing the ingredients, but will delay the condition and cause harm. The peach blossoms are lightly flowing, leaving only spring colors all over the earth, so let us deal with it scientifically and stay away from “peach fungus” in this spring.