Eczema is an inflammatory skin disease caused by a variety of internal and external factors. Clinically, acute eczema is characterized by erythema and papules, on top of which there is a significant tendency of tissue fluid exudation, resulting in what patients often refer to as “yellow water”, which generally requires a combination of effective oral medication and wet application of the solution. The clinical manifestations of eczema are obviously polymorphic and can be divided into acute, subacute and chronic eczema types according to the course of the disease and clinical features, representing the dynamic evolution of skin inflammation and can gradually evolve to other stages from any one type. The tendency to exude is most pronounced in acute eczema, and gradually decreases in subacute eczema, while chronic eczema is mainly characterized by hypertrophy and hyperplasia, with exudation being less common. The purpose of internal drug therapy for all types of eczema is anti-inflammatory and antipruritic, so various antihistamines are the basis of eczema treatment, and some patients with severe acute conditions can be treated with oral glucocorticoids, which can effectively reduce the inflammatory response of the skin at the lesion site and reduce yellow water exudation in the short term. At the same time, acute eczema exudate obvious period using wet dressing treatment, generally choose 3% boric acid lotion, soaked 4 to 6 layers of gauze and wrung to half dry and then applied externally to the affected area, each time about 15 to 20 minutes, in the solution evaporated at the same time will be too much exudate absorption, can play astringent trauma, reduce the role of exudation, while boric acid has a certain antibacterial effect, can prevent acute eczema exudate parts Bacterial infections can be prevented at the site of acute eczema.