Seasonal light erythematous patches, also called peach fungus, are called seasonal contact dermatitis in Western medicine. The disease occurs on women’s faces and starts as flushed or light red coin-like patches with a few small red papules with indistinct borders and a small amount of scales attached. Because it tends to flare up in the spring and heal on its own after the season, it is imaginatively called peach fungus in Chinese medicine. Pollen antigens are an important causative factor for this disease, and seasonal light erythema may be an IgE antibody-mediated delayed skin allergy caused by exposure to pollen antigens dispersed in the air. In Chinese medicine, the disease is thought to be caused by internal heat in the lung and stomach, combined with external wind-heat. So, what are the preventive methods for seasonal light erythema? The following is a brief introduction to the prevention of seasonal light erythema: 1, pay attention to the protection of facial skin, spring activities should try to avoid prolonged wind and sun exposure, good sun protection measures, the skin itself is prone to allergies to pay attention to less go to places with a lot of dust. 2, try to eliminate possible causes, wash your face immediately after going out and coming home to remove allergic substances from your skin, and avoid using strong alkaline soap to avoid stimulating your skin. 3, life should be regular, rest on time, to ensure sleep, a light diet, prohibit or less spicy stimulating food. 4, treatment to avoid excessive sun exposure, correct the child’s poor dietary habits, eat more fruits, vegetables and appropriate add some coarse grains to ensure the supply of multivitamins. In addition, when you go out, you should clean the pollen, dust and other allergic substances that fall on the face, neck and back of the hands to reduce the chance of disease. If the symptoms are already present, do not be overly nervous. If the symptoms are only mild, you can improve them by using a moisturizing skin care cream, and you can supplement with a multivitamin, but if the skin is obviously red and itchy, go to the local hospital as soon as possible.