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Psoriasis is a long-lasting, noncontagious autoimmune disease characterized by patches of abnormal skin.
(red, pink, or purple, dry, itchy, and scaly).
Psoriasis varies in severity from small localized patches to complete body coverage. Injury to the skin can trigger psoriatic skin changes at that spot, which is known as the Koebner phenomenon
Guttate psoriasis has drop-shaped lesions. Pustular psoriasis presents as small, noninfectious, pus-filled blisters.
Inverse psoriasis forms red patches in skin folds.
Erythrodermic psoriasis occurs when the rash becomes very widespread and can develop from any of the other types.
Fingernails and toenails are affected in most people with psoriasis at some point in time. This may include pits in the nails or changes in nail color.
The disease affects 2–4% of the population.Men and women are affected with equal frequency.The disease may begin at any age, but typically starts in adulthood. Psoriasis is associated with an increased risk of psoriatic arthritis, lymphomas, cardiovascular disease, Crohn’s disease, and depression. Psoriatic arthritis affects up to 30% of individuals with psoriasis. The word “psoriasis” is from Greekmeans ‘itching condition’ or ‘being itchy’, from psora ‘itch’, and -iasis ‘action, condition’.
Scalp psoriasis is a chronic autoimmune condition that causes inflamed, itchy, red patches on the scalp.
Symptoms
* Itchy, flaky, red scalp
* Thick, silvery scales
* Dry scalp that may crack and bleed
* Burning sensation or soreness
* Temporary hair loss
* Patches that may extend beyond the hairline
Causes
* An immune system malfunction that tells skin cells to grow too quickly
* The body doesn’t shed the excess skin cells
Treatment
* Topical (skin-based) medications, such as: Salicylic shampoos Ketaconazole& ciclopirox based shampoos
* Systemic agents, such as: Immunosuppressants like methotrexate and ciclosporin acitretin ( oral retinoids )
Scalp psoriasis can range from mild to severe. It can worsen with stress and after some infections.