Eczema 湿疹

Eczema is a skin inflammatory reaction with polymorphic skin lesions and exudation tendency caused by a variety of internal and external factors. It often manifests as skin erythema, papules, itching, erosion and exudation. It is clinically classified according to the characteristics of the skin lesions. It has three stages: acute, subacute and chronic. The disease is characterized by stubbornness, recurrence and protracted recovery. At present, the pathogenesis of eczema is not completely clear, and it is mostly believed to be related to factors such as genetics, immune response, and skin barrier dysfunction.

According to traditional Chinese medicine, the disease is mostly caused by the accumulation of “dampness evil” in the body, and is caused by external wind, dampness, and heat evils. The combination of internal and external evils overflows on the surface of the skin and causes the disease. In different stages of the disease, the manifestations are different, and because dampness is a Yin evil, its nature is heavy and turbid, its nature is sticky, lingering and difficult to heal, and it is easy to consume and damage Yin and blood; and it has the tendency of recurrence. Chronic eczema is often a combination of cold and heat, with both deficiency and excess, and cannot be treated by one method. It needs to be treated based on syndrome differentiation and a combination of acupuncture and medicine on the basis of avoiding contact with allergens.

湿疹是由多种内、外因素引起的具有多形性皮损和渗出倾向的一种皮肤炎症反应，常表现为皮肤红斑、丘疹、瘙痒、糜烂及渗出等，根据皮损特点临床分为急性、亚急性、慢性三期，该病具有病情顽固、反复发作、迁延不愈的特点。目前，湿疹的发病机制尚未完全明确，多认为与遗传、免疫反应、皮肤屏障功能障碍等因素有关。

中医学认为，本病多因湿邪蕴结体内，复因外感风、湿、热邪，内外两邪相合，溢于肌表而发为本病。在疾病的不同时期，表现有所不同，又因为湿为阴邪，湿性重浊，其性黏腻，缠绵难愈，且易耗伤阴血，日久化燥伤阴，虚风内生，反复发作。慢性湿疹常寒热错杂，虚实兼具，治疗非一方一法可达，需在避免接触过敏原的基础上，辨证施治，针药并用。