Arm eczema can be divided into acute eczema, subacute eczema, chronic eczema, etc., different types of eczema symptoms are different, acute pinhead-sized papules, subacute eczema lesions red and swollen, chronic eczema lesions hypertrophic roughness. 1. Acute eczema: mainly manifested as erythema on the basis of the appearance of pinhead-sized papules, papules, serious times can appear small blisters, often fused into a piece, the boundary is not clear, can be due to scratching and the formation of punctate vesicles, there is obvious plasma exudate. And accompanied by intense itching symptoms. 2. Subacute eczema: because of acute eczema inflammation reduction or inappropriate treatment, the course of the disease is longer and developed, manifested as redness and swelling and oozing reduced, but there can still be pimples, lesions are mainly dark red, with a little scaling, and self-consciousness of intense itching. 3. Chronic eczema: acute and subacute eczema from the extension, manifested in the skin infiltration of dark red spots on the pimples, scratches and scales, and local skin thickening, roughness, the presence of varying degrees of moss-like disease, pigmentation, etc., there can be obvious itching. Once the above abnormal manifestations, it is necessary to pay attention to timely hospital consultation and treatment.