Eczema is an inflammation of the superficial dermis and epidermis caused by internal and external factors. Clinically, the acute phase of lesions is dominated by herpes with a tendency to exude, while the chronic phase is dominated by mossy changes and is prone to recurrence. Eczema is called wet sores in Chinese medicine and is an allergic inflammatory skin disorder. It is named because the lesions are always wet, oozing and crusty. Its clinical characteristics are symmetrical distribution of lesions, polymorphic damage, intense itching, tendency to exude, recurrent attacks, and tendency to become chronic. According to the course of the disease, it can be divided into three categories: acute, subacute, and chronic. Acute eczema is dominated by papules, with obvious inflammation and easy exudation; chronic eczema is dominated by mossy changes and is prone to recurrence. The disease can develop in both men and women, young and old. The etiology of eczema is still unclear and may be related to internal factors (chronic infectious lesions, endocrine and metabolic changes, blood circulation disorders, neuropsychiatric factors, genetic factors, etc.) and external factors (food, inhalants, living environment, animal fur, various chemical substances, etc.). According to the course of the disease and clinical characteristics can be divided into acute, subacute and chronic eczema: 1, Acute eczema: commonly found in the face and ears, hands, feet, forearms, calves and other exposed areas, severe cases can diffuse the whole body, often symmetrically distributed. 2, subacute eczema: due to acute eczema inflammation reduced or inappropriate treatment after a longer development of the disease. The performance of redness and exudation is reduced, but there can still be papules and a small number of papules, the skin is dark red, there can be a little scaling and mild infiltration. Still consciously have intense itching. 3, chronic eczema: from acute eczema and subacute eczema, can also be due to mild irritation, sustained and at the beginning of the performance of chronic. It is common in the hands, feet, calves, elbow fossa, femur, breast, vulva, anus, more symmetrical onset. Eczema is usually treated with systemic medication and topical medication. During this period, attention should be paid to avoiding various suspected causative factors, spicy food and alcohol consumption during the onset of the disease, and excessive washing and scalding. Chinese medicine treatment is based on clearing heat and dampness to relieve itching. In acute cases, the main treatment is to clear heat and dampness, while in chronic cases, the main treatment is to nourish blood and moisten the skin. External treatment with mild drugs is advisable to avoid aggravating the condition.