Erythrodermic psoriasis is the least common type of psoriasis. It can cover the entire body with a scaly rash that can itch or burn intensely. It may be triggered by corticosteroids or other medications, severe sunburn, or another type of psoriasis.

Treatment of erythrodermic psoriasis usually requires prescription oral medication, medicated wet dressings and topical steroids. For severe disease, you might need a combination of therapies and hospital care.