Psoriasis

Plaque psoriasis; Psoriasis vulgaris; Guttate psoriasis; Pustular psoriasis

Psoriasis is a skin condition that causes skin redness and irritation. Most people with psoriasis have thick, red, well-defined patches of skin with flaky, silver-white scales. These patches are called plaques.

Psoriasis on the knuckles

This is a picture of a typical case of psoriasis, with small lesions on the knuckles. Note the changes in the fingernails.

Causes

Symptoms

Exams and Tests

Treatment

Support Groups

Outlook (Prognosis)

When to Contact a Medical Professional

Prevention