The authors review the formation of the psoriasis pathogenesis theory of "treatment from blood". The development status and deficiencies of the theory is summarized. Aiming at some important issues of the pathogenesis theory

combining with the analysis of epidemiological evidence

the authors put forward new ideas for psoriasis pathogenesis theory that "Yang deficiency of spleen and kidney is the basis

with the incentive of exogenous pathogen invading

while the symptoms are heat in blood and blood stasis". The authors advocate that Chinese medicine treatment of psoriasis should "treat the symptoms from blood and treat the root from invigorating spleen-consolidating kidney".Controlling and reducing recurrence are taken as the entry point in Chinese medicine treatment.