As an adjunctive treatment to one of the specific types of eczema, red beans and barley are of little therapeutic significance when applied alone. Eczema is routinely divided into 4 types, including damp-heat, spleen-deficiency, yin-deficiency, damp-heat and blood-deficiency, and these 4 types correspond to the treatment rules of clearing heat and dampness, strengthening the spleen, nourishing yin to dispel damp-heat and nourishing blood to dispel wind. Therefore, the clinical prescriptions are selected according to these four basic rules of treatment, which is in line with the basic theory of Chinese medicine on the theory and prescription of medicine. Red bean and barley as a common Chinese medicine, according to the properties of cold, hot, warm and cool, and the four qi and five tastes, and the generalization of the meridian, the combination of the two has a certain effect of clearing heat and promoting dampness, which can be used in the treatment of damp-heat type eczema, that is, the damp-heat evil has a good therapeutic effect, while eczema as a kind of allergic reaction, the clinical performance of erythema and itching. Therefore, the formula should also include herbs to clear heat and dampness, detoxify and relieve itching, such as raw earth, dandruff, double flower, forsythia, ground skin and fresh peel, red beans and barley with the above drugs under the rule of clearing heat and dampness, in order to have a good therapeutic effect on damp-heat type eczema, while for spleen deficiency, yin deficiency damp-heat type and blood deficiency wind-dry type eczema, red beans and barley has no therapeutic significance.