Psoriasis is a common and refractory chronic

inflammatory skin disease. In recent years

researchers generally believe that the incidence of psoriasis is closely related to immune disorders. The inflammatory cells involved in psoriasis are consistent with those regulated by mesenchymal stem cells. The immune imbalance of helper T cells17/regulatory T cells（ Th17/Treg） regulated by mesenchymal stem cells may be a key link in the pathogenesis of psoriasis. The theory of Chinese medicine strengthening vital qi to eliminate pathogenic factor and the regulation of immune balance by mesenchymal stem cells have different approaches but equally satisfactory results. Mesenchymal stem cells can promote the proliferation of anti-inflammatory lymphocytes Treg

but have no obvious effects on pro-inflammatory lymphocytes Th17. Kidney-tonifying Chinese medicine and mesenchymal stem cells has similarities in terms of source and function. Therefore

in the clinical treatment of psoriasis

it is necessary to pay attention to the use of tonifying and replenishing Chinese medicines

while eliminating pathogenic factors

such as reliving wind

clearing heat

cooling blood

activating blood

so as to improve clinical efficacy.