Chronic eczema is an inflammation of the superficial dermis and epidermis caused by a variety of internal and external factors, infection can be induced, but the disease is not directly related to bacterial infection. The causes of chronic eczema are complex, related to allergies and genetic factors, generally gastrointestinal disorders, mental stress, nerve dysfunction, endocrine disorders, the body has an infected lesion, intestinal parasites and so on can also cause chronic eczema. Chronic eczema can also be induced by sunlight, wind, cold, heat, scratching, friction and contact with soap, cosmetics, etc., as well as animal fur, plants, chemicals, etc. in daily life. It leads to polymorphic rashes such as erythema, papules, oozing, vesicles, and scabs all over the body, often accompanied by significant itching. Chronic eczema is recommended to consult a doctor in a timely manner, according to the specific circumstances of the external glucocorticoid drugs, internal antihistamines, etc., the specific use of drugs recommended to follow the doctor’s instructions.