Psoriasis is a common, chronic, and relapsing scaly erythematous skin disease, occurring worldwide at any age, with no clear gender predilection. It shows a bimodal age distribution, with incidence peaks between 30–39 and 50–69 years. Prevalence varies considerably across populations, ranging from 0.5% to 11.4% globally, and tends to increase with distance from the equator [1].
