Symptoms and Severity

In addition to scalp, knees, elbows and torso, psoriasis can also develop on the nails, hands, feet, genitals, buttocks, and, rarely, on the face.

Psoriasis can be painful, itchy, and/or burn.

Psoriasis can be mild, moderate, or severe, depending on how much body surface area (BSA) it covers.

* The palm of the hand equals 1% of the skin.

The severity of psoriasis is also measured by the impact psoriasis can have on a person’s quality of life. Psoriasis can have a big impact even if it involves a small percentage of BSA.

Psoriasis tends to wax and wane. Various things can cause psoriasis to worsen, but this varies from person to person.