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 Dermatology Department after long-term observation, the use of moisturizers with skin barrier protection function after bathing can play a supplementary treatment and significantly reduce the role of recurrence. 3, usually wear cotton soft underwear, avoid scratching and rubbing the skin. 4, eczema patients with the highest proportion of cod allergy, followed by egg yolk, egg whites, again for peanuts, soybeans, shrimp, and then rare is crab, rice, wheat and chicken, milk allergy incidence is relatively minimal, the six allergy-prone suction character to dust mite allergy rate is the highest, followed by cockroaches, again for the point green, cross-linked mold for, and the least common is mulberry, sycamore, law grass. But unless the evidence is conclusive, do not easily abstain from eating to avoid malnutrition. 5, treatment Reasonable topical glucocorticoids, do not be overly afraid of its side effects; in acute attacks with a large number of exudate stage can also be small doses, short injections or oral hormones to control acute inflammation. For eczema occurring on the face, non-hormonal products such as tacrolimus gel or Bute cream can be preferred. Narrow-wave ultraviolet radiation is also very effective in controlling the condition and reducing the amount of hormones used. Severe eczema on the hands and feet can be treated with PUVA therapy (UV irradiation after topical application of photosensitizing substances) and semiconductor laser irradiation. 6, look carefully for the cause If there is no eczema originally, suffering from hypertension and the onset of the disease after taking medication, it may be related to calcium antagonists in antihypertensive drugs; eczema occurs after suffering from dermatophytosis (such as ringworm, nail fungus, ringworm, etc.), especially in patients over 50 years of age, it may be related to the immune imbalance of the body.