Eczema is an inflammatory skin disease and is one of the most common diseases in dermatology. It is characterized by intense itching and recurrent episodes. Classic eczema often has yellowish exudate, especially after scratching, and crusts after drying; however, when it becomes chronic, the skin thickens due to repeated scratching, which manifests as roughness, dryness, and deepening of texture. The etiology of eczema is complex. The intrinsic factors are mainly immune imbalance and disruption of skin barrier function, while the extrinsic factors include dry and cold environment, excessive washing, exposure to allergenic substances or taking medications and health products, food additives, etc. After careful analysis, exclusion and skin testing, most patients can find the cause. Eczema can recur and affect the quality of life, and a small number of patients can develop into erysipelas, which can even be life-threatening. With reasonable prevention and treatment, eczema is completely manageable. The key to eczema treatment is to identify and remove the cause and prevent recurrence. Eczema patients in daily life and treatment should pay attention to: 1, eczema is not contagious Eczema is not caused by unhygienic, too frequent washing or bathing with very hot water will instead destroy the skin barrier, inducing and aggravating the condition. 2, adhere to the use of moisturizers to prevent recurrence Ruijin Hospital Department of Dermatology after long-term observation, the use of moisturizers with skin barrier protection function after bathing can play a role in aiding treatment and significantly reduce recurrence. 3, usually wear cotton soft underwear, avoid scratching and rubbing the skin. 4, many patients believe that eczema is caused by diet, but there is no evidence of the existence of foods that can cause eczema. Therefore, unless the evidence is conclusive, do not abstain from eating to avoid malnutrition. 5, treatment Reasonable topical glucocorticoids, do not be overly afraid of their side effects; in the acute phase of the attack can also be small doses, short injections or oral hormones to control acute inflammation. For eczema occurring on the face can be preferred to non-hormonal such as tacrolimus ointment. Narrow-wave ultraviolet irradiation is also a very effective way to control the condition and reduce the amount of hormones. Severe eczema on the hands and feet can be treated with PUVA (UV irradiation after topical application of photosensitizing substances). 6.Carefully search for the cause If there is no eczema originally, but suffer from hypertension and develop after taking medication, it may be related to the calcium antagonist in antihypertensive drugs; eczema occurs after suffering from dermatophytosis (such as ringworm, nail fungus, ringworm, etc.), especially in patients over 50 years old, it may be related to the immune imbalance of the body. 7. Regular outpatient follow-up visits to the “eczema-specific clinic