IL17A and psoriasis: The Psoriasis Area and Severity Index (PASI), clinical symptom score, serum inflammatory factors, p38MAPK gene expression in lesion tissue, and clinical outcome were compared between the two groups.<h4>Results</h4>After treatment, the PSAI score (t=5.051) and symptom score (t=14.102) of the study group were lower than those of the control group, and the relative expression of interleukin-6 (IL-6) (t=7.514) and p38MAPK (t=4.219), the relative expression of interleukin-17 (IL-17) (t=2.579) was lower than that of the control group.