Eczema is a dermal inflammation with effusing lesions caused by internal and external factors. It is characterized by polymorpous and easy chronic skin rashes with easy recurrence and pruritus. The parthenogenesis of this disease is caused by allergic reaction, which can include: food, medications, intestinal parasites, bacteria, pollen, animal furs, or heat and cold. The occurrence of this disease may also be related to indigestion, endocrine disturbance, and mental factors. In Chinese Medicine, this disease belong to categories of “Damp Boil” and “Damp Toxic Boil.” This disease is mostly caused by pathogenic wind, dampness and heat, and chronic condition is often related to wind and dryness due to blood deficiency. The parthenogenesis of this disease is related to constitutional intolerance, leading to accumulation of pathogenic wind, dampness and heat in the muscle and skin. If the spleen and stomach are damaged by improper food intake leading to failure of the spleen in transportation, mixture of the internal dampness and external pathogenic factors, or blood heat in the body, and severe dampness and heat can all result in acute attack of the skin rashes in the whole body due to infiltration of dampness and heat tin the muscle and skin. When pathogenic dampness subsides gradually after a long duration and pathogenic heat consumes and damages yin and blood, wind and dryness can be caused by blood deficiency.
Treatment based on Syndrome Differentiation:
-Syndrome of Infiltration of Dampness and Heat -> tx: clear away heat and remove dampness; Formula: Longdan Xie Gan Decoction
-Syndrome of Accumulation of Dampness due to Spleen Deficiency -> tx: strengthen the spleen and dissolve dampness; Formula: Chu Shi Wei Ling Decoction
-Syndrome of Blood Deficiency and Wind-Dryness -> tx: nourish blood and moisten dryness; Formula: Yang Xue Ding Feng Decoction