Diagnosing eczema can be done through symptoms of eczema as well as clinical tests. Eczema includes acute eczema, chronic eczema, subacute eczema and other types. 1. Acute eczema: after the onset of the patient’s performance in the local symmetrical erythema, there will be small pimples of the size of millet, serious patients show small blisters, can have erosion, oozing, accompanied by intense itching symptoms. 2. Chronic eczema: patients with infiltration of dark red spots, scales, scratches, papules and other manifestations. Some patients also have localized skin thickening symptoms, often accompanied by different degrees of moss-like changes. 3. Subacute eczema: patients with redness and swelling as well as oozing continues to reduce, but there are also a small number of papules, patients with skin lesions presenting a dark red color, and at the same time there are intense itching symptoms. If necessary, it can be combined with laboratory and pathological examination to determine the synthesis. Eosinophilia can be found in routine blood tests. Fungal examination can exclude tinea cruris, allergen examination, such as whether there is an allergic reaction to mold, cat and dog dander, pollen, etc. After finding the allergens, according to the test results of targeted treatment. As the recurrence rate of eczema is relatively high, once eczema appears, timely medical treatment, and early diagnosis and treatment under the guidance of the doctor.