Eczema is divided into many kinds, according to the performance of lesions into acute eczema, subacute eczema, of which chronic eczema is a skin inflammatory reaction caused by complex internal and external factors stimulated; the onset is very slow, the performance is also very significant, different from acute eczema and subacute eczema. 1, according to the performance of the lesions are divided into acute, subacute, chronic three stages. (1) acute eczema lesions at first for most dense corn-sized papules, papules or small blisters, the base flushed, gradually fused into patches, due to scratching, papules, papules or blisters top scratching is obvious point-like exudate and small erosion surface, the edge is unclear. If secondary infection occurs, the inflammation is more obvious and can form pustules, pustules, folliculitis, boils, etc. It is often found on the head and face, behind the ears, distal extremities, scrotum, perianal area, etc., and is mostly released symmetrically. (2) subacute eczema acute eczema after the reduction of inflammation, the lesions are mainly small papules, crusts and scales, only a small amount of papules and vesicles; there is still intense itching. (3) chronic eczema: often due to acute, subacute eczema recurrent episodes do not heal and turn into chronic eczema; can also start that is chronic eczema. Manifestation of the affected skin thickening, infiltration, brownish red or pigmentation, rough surface, covered with scales, or due to scratching and crusting. Itching is intense. It is common on the lower legs, hands, feet, elbow fossa, popliteal fossa, vulva and anus. The course of the disease is variable, easy to recur and does not heal over time. 2, according to the extent of the lesions involved, divided into two categories of limited eczema and generalized eczema. (1) limited eczema: only occurs in specific areas, that is, you can name the site, such as hand eczema, female eczema, scrotal eczema, ear eczema, breast eczema, perianal eczema, calf eczema, etc. (2) generalized eczema: lesions are many, generalized or distributed in many parts of the body. Such as coin eczema, self-sensitive eczema, lack of lipid eczema. What are the treatments for chronic eczema? 1, the general principles of prevention and treatment to find allergens as far as possible; to avoid all kinds of external stimuli; to avoid allergic and irritating food. 2, the internal use of drugs one or two drugs because eczema is mostly severe itching at night, it is best to take one each after dinner or before going to bed. Generally, it is not advisable to use oral or hormone injections can also be used to treat Chinese medicine. 3, topical drugs Topical creams, if necessary, can be sealed package. Chronic eczema has a great impact on people, but also affects the mood; once diagnosed with chronic eczema, to go to a regular hospital in time to go to treatment, you can also choose targeted creams to treatment and care.