The main symptom of eczema is a change in lesions, which can usually be distinguished by the location of the lesions and the shape of the lesions. In addition, clinical examination can also assist in confirming the diagnosis. The first is that the eczema can be identified 1, the distribution of lesions: can occur in any part, commonly in the face, behind the ears, the flexors of the limbs, breasts, hands, scrotum and other places, and is symmetrically distributed. 2, the shape of the lesions: the lesions are initially dense corn-sized papules, papules or small blisters, tend to exude. When it develops into chronic, the skin is thickened, infiltrated, brownish red or pigmented, covered with scales, or crusted due to severe itching and scratching. 3, examination: fungal test positive can usually confirm the diagnosis. 4, and other dermatitis identification: acute eczema should be distinguished from contact dermatitis, the latter lesions are more single, clear boundaries, mainly confined to the contact site, the removal of the cause of faster healing; chronic eczema should be distinguished from neurodermatitis. The neurodermatitis lesions are more skin deepening, Pi Saki elevation, dry, rough, mossy performance. Second, how to treat eczema 1, oral drug therapy: antihistamines to stop itching, generalized eczema can be oral or injectable glucocorticoids, but should not be used for a long time. 2, topical drug therapy: acute eczema local saline, 3% boric acid rinse, wet compresses, furnace glycerine lotion astringent, protection. Sub-acute, chronic eczema application of appropriate glucocorticoid creams. Third, how to prevent eczema 1, try to reduce external stimuli, such as hot water scalding, excessive scratching, cleaning. 2, clothing should be loose to reduce friction stimulation, do not make chemical fiber and woolen fabrics directly contact the skin. 3, less contact with chemical products, such as soap, washing powder, detergent, etc. 4.Avoid foods that may cause allergy and irritation, such as chili, strong tea, coffee, alcohol, etc. 5.Living and rest should be regular, pay attention to the combination of work and rest.