What is eczema? What are the symptoms of eczema?

Eczema is a common skin disease, which is generally divided into three types according to the characteristics of the skin: acute, subacute and chronic eczema. The lesions of acute eczema are polymorphic, including erythema, papules, papules, blisters, erosion, exudation and scabbing, accompanied by severe itching. Generally, subacute eczema is characterized by erythema, papules, scabs and scales after the inflammation of acute eczema is relieved, and there is still obvious itching.