2. It most commonly occurs in adulthood
Psoriasis occurs equally among men and women and across different races. “We also know there’s a genetic predisposition for it,” says Dr. Gooderham. “If you carry the gene, there’s usually a trigger that causes it to manifest, whether it’s stress or an infection.” However, says Dr. Gooderham, “only about one-third of patients know someone in their family with the condition, and there are approximately 20 different genes.” Psoriasis could be triggered at any time from childhood to adulthood, but it most commonly occurs between the ages of 30 and 50.