Seasonal light erythematous patches, also called peach fungus, are called seasonal contact dermatitis in Western medicine. The disease occurs on the face of women 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. Itchiness or dryness is felt. It is sometimes accompanied by a history of allergic rhinitis or other allergic diseases. So, what should be done to prevent seasonal light erythematous patches? The following is a brief description of common prevention methods: 1. It is windy and dry in spring, so to prevent peach fungus you should drink more water so that your skin also absorbs sufficient moisture and is not too dry. 2, after the appearance of peach fungus do not localize the affected area hot compresses, do not use too hot water bath. 3.Do not apply medicine indiscriminately and do not apply ointments with hormones. 4.After the appearance of ringworm peach fungus should stop using cosmetics and skin care products first under the guidance of a doctor for observation. If you use skin care products it is recommended to use branded products purchased through regular channels.