What are the types of psoriasis?

Updated: Nov 20, 2020
  • Author: Jacquiline Habashy, DO, MSc; Chief Editor: William D James, MD  more...
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Answer

The diagnosis of psoriasis is clinical, and the type of psoriasis present affects the physical examination findings.

Types of psoriasis

Common types of psoriasis include the following:

  • Chronic stationary psoriasis (psoriasis vulgaris): Most common type of psoriasis; involves the scalp, extensor surfaces, genitals, umbilicus, and lumbosacral and retroauricular regions

  • Plaque psoriasis: Most commonly affects the extensor surfaces of the knees, elbows, scalp, and trunk

  • Guttate psoriasis: Presents predominantly on the trunk; frequently appears suddenly, 2-3 weeks after an upper respiratory tract infection with group A beta-hemolytic streptococci; this variant is more likely to itch, sometimes severely

  • Inverse psoriasis: Occurs on the flexural surfaces, armpit, and groin; under the breast; and in the skin folds; this is often misdiagnosed as a fungal infection

  • Pustular psoriasis: Presents on the palms and soles or diffusely over the body

  • Erythrodermic psoriasis: Typically encompasses nearly the entire body surface area with red skin and a diffuse, fine, peeling scale

  • Scalp psoriasis: Affects approximately 50% of patients

  • Nail psoriasis: May be indistinguishable from, and more prone to developing, onychomycosis

  • Psoriatic arthritis: Affects approximately 10-30% of those with skin symptoms; usually in the hands and feet and, occasionally, the large joints

  • Oral psoriasis: May present as severe cheilosis, with extension onto the surrounding skin, crossing the vermillion border

  • Eruptive psoriasis: Involves the upper trunk and upper extremities; most often seen in younger patients
  • Napkin psoriasis: Presence of psoriasis in children's diaper region

  • Linear psoriasis: Psoriasis that occurs within a dermatome


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