Eczema is an inflammatory allergic skin disease that is prone to recurrence, but there is no such thing as a root cause. The root cause of the disease is one’s own constitution and allergens, which is difficult to change completely and needs to be improved through lifestyle habits and care, in addition to actively seeking and removing various allergens. The disease is caused by a number of exogenous and endogenous factors acting alone or together. Exogenous factors include living environment, climatic conditions, sunlight, ultraviolet light, cold, heat, humidity, dryness, cosmetics, soap, dyes, artificial fibers, etc. Endogenous factors are mainly related to genetic constitution, mental factors, endocrine and metabolic disorders. If you want to reduce the recurrence of eczema, you should try to reduce the stimulation of these external factors such as using more moisturizing creams in winter, bathing water temperature should be low, high temperature and high humidity in summer to bathe regularly to keep clean and dry, and if certain foods can make eczema worse, you should control your diet. The first choice for treatment is antihistamines, such as ketotifen, paracetamol, loratadine, cetirizine, fexofenadine, etc. Acute attacks or generalized eruptions can be treated with glucocorticoids orally or intravenously as appropriate. Chronic eczema can be combined with some Chinese medicines to dispel wind and relieve itching, such as skin itching granules, moistening and anti-itching capsules, Yu Ping Feng granules, etc. Topical medications include glucocorticoid ointment, halometasone ointment, dexamethasone ointment, tretinoin ointment, etc. Medications should be used under the guidance of a doctor. The way to eradicate eczema is to avoid various allergens while actively cooperating with medication and avoiding bad habits such as spicy, stimulating diet, smoking and alcohol, excessive washing with soap and hot water, violent scratching, etc.