In short
Psoriasis is a skin disease that causes itchy or sore patches of thick, red skin with silvery scales.
What it is1
The main symptom of psoriasis is dry, itchy, sore, flaky patches of skin that form what look like silvery-white scales.
NHS website
Worth knowing5
Psoriasis is caused by your skin making more skin cells than usual, which creates patches on the skin.
NHS websitePsoriasis is not contagious so you cannot catch it or spread it.
NHS websitePsoriasis usually occurs in adults.
MedlinePlusTriggers can include: stress; drinking alcohol or smoking; living with obesity; being pregnant; certain medicines; infections, such as strep A and HIV; cuts, scratches or grazes on your skin; sunlight.
NHS websiteThere are usually times where your symptoms get worse (called flare-ups) and times when they're better.
NHS website
What helps2
The main treatments are: vitamin D creams, lotions, ointments and gels; moisturizing creams, lotions, ointments and gels for your skin and to wash with (emollients); steroid creams, lotions or gels; other treatments for your skin or scalp, such as coal tar.
NHS websiteThings that can help: try to avoid the things that make your symptoms worse (triggers); have a healthy, balanced diet; get regular exercise; try to reduce stress if you can; try not to drink too much alcohol; try to stop smoking, if you smoke.
NHS website
See a provider if2
See a health care provider if you have symptoms of psoriasis; you have psoriasis and your treatment is not working or is giving you side effects; you have psoriasis and also have pain, stiffness and swelling in your joints that keeps coming back.
NHS websiteSpeak to your doctor or a pharmacist if you're pregnant or trying to get pregnant.
NHS website
Sources
- MedlinePlus, National Library of Medicine: Psoriasis
- NHS website: Psoriasis (adapted; Open Government Licence v3.0), as at 13 October 2026
Contains public sector information licensed under the Open Government Licence v3.0.
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