When does a person get psoriasis?

There is, however, a peak period for developing this disease—between 20 to 30 years of age. Most people who get psoriasis will develop it before their 40th birthday.

You can also get psoriasis later in life. A peak period for developing late-onset psoriasis is between 50 and 60 years of age.

Women tend to develop psoriasis at a younger age than men.

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Reference
van de Kerkhof PCM and Nestle FO. (2018) “Psoriasis.” In: Bolognia JL, Schaffer JV, et al. editors. Dermatology, 4th ed. China, Elsevier: p. 138.