Eczema [history taking] 1. Acute eczema: manifests as a generalized and polymorphic rash with symmetrical distribution of lesions, mostly on the face, ears, hands and feet, forearms, lower legs and other exposed areas, which can extend to the whole body in severe cases. The itching is intense, with a burning sensation, and can be aggravated by paroxysms, especially at night, affecting sleep and work. Some can be exposed to allergens again, new stimuli or improper handling and excessive scratching again in acute attacks. It is a good idea to have a good look at the website. Physical examination】Systematic examination is the same as that of internal medicine. Dermatologic conditions: 1. Acute eczema: often on the basis of erythema with pinpoint to corn-sized papules, papules, and in severe cases, small blisters, often fused into patches, the boundaries are not clear. The periphery of the damage, the above-mentioned polymorphic rash gradually thinning, itching is more serious, can be due to scratching the formation of vesicles and plasma exudate and crust, such as secondary infection can form pustules, pus, the corresponding superficial lymph nodes can be enlarged. 2. subacute eczema: there can be papules and a small number of papules, dark red, blisters and vesicles gradually heal, and can have scales. 3. chronic eczema: there are scattered erythema or scratch marks due to itching of the skin, and over time the affected skin is thickened, the surface is rough, mossy, with hyperpigmentation or partial hypopigmentation areas and scales. Due to the different sites of onset, the performance also varies. For example, hand eczema, elbow eczema, breast eczema, vulvar, scrotal and anal eczema, calf eczema, etc. There are also some special types of eczema, such as coin-shaped eczema, sweat blisters, etc. Laboratory tests] If contact factors are suspected, patch test should be done to find allergens. Diagnosis and differential diagnosis 】 Based on the polymorphic nature of the primary rash of skin lesions in the acute phase, easy exudate, intense itching, symmetrical episodes and chronic phase of infiltration, hypertrophy and other characteristics of diagnosis is not difficult, but to distinguish the type. Acute eczema needs to be distinguished from contact dermatitis, chronic eczema needs to be distinguished from neurodermatitis, and hand and foot eczema needs to be distinguished from tinea cruris. The general principles of prevention and treatment: (1) as far as possible to find the cause of the disease, the patient’s work environment, habits, food habits and emotions for an in-depth understanding of the patient to find out whether there are chronic lesions and visceral organ disease. (2) Avoid various external stimuli such as hot water, violent scratching, excessive washing, etc. (3) Avoid allergenic and stimulating foods, such as fish, shrimp, strong tea, coffee, alcohol, etc. 2. Internal therapy: antihistamines, sedatives and tranquilizers can be used. In the acute phase, calcium, vitamin C, sodium thiosulfate intravenous injection, short-term application of corticosteroids for acute generalized patients with various therapies are not obvious. 3. local therapy: (1) acute eczema; no exudate, available glycopyrrolate lotion, exudate more cold wet compresses with 3% boric acid solution, after the reduction of exudate can be used alternately with corticosteroid creams and wet compresses. (2) subacute eczema: generally often choose bran distillate, black bean distillate and corticosteroid ointment or zinc oxide paste. (3) chronic eczema: commonly used corticosteroid ointment, cream or skin disease hard cream. If the lesions are obviously hypertrophic, liquid nitrogen cryotherapy can be used. The actual results and discharge criteria 】 1. Clinical cure: symptoms disappear, lesions subside. 2. Anyone who achieves clinical cure or improvement and stable condition can be discharged from the hospital.