The cause of psoriasis is not fully understood but has to do with a hyperactivity of white blood cells (T-cells) that trigger inflammation in the skin and cause increased turnover. The skin starts to “pile up” in certain areas resulting in the lesions of psoriasis. Flares of psoriasis may occur in the winter, during times of stress, after trauma to the skin (this is called a Koebner Phenomenon), after an infection like strep throat, and with certain drugs such as beta-blockers, lithium and anti-seizure medications.

Treatment of psoriasis depends on a patient’s overall health, presence of joint pain and severity of skin involvement. In mild cases, topical corticosteroids and vitamin D analogues are prescribed. Targeted excimer or full body narrowband UVB is usually helpful for those with more resistant or extensive skin disease. For patients who do not respond to phototherapy or who have psoriatic arthritis, immunosuppressive and biologic medications are an option.

Psoriasis is not curable but is controllable. No single approach works for everyone. Therapy is individually tailored and based on your health, goals, and a careful assessment of potential risks and benefits of treatment.

Learn more about psoriasis on aad.org.