Psoriasis is a common skin condition that occurs when the immune system becomes overactive and attacks skin cells. Because of this, the skin cells go through their life cycle more quickly, and red patches develop on the skin’s surface. These lesions can be itchy and painful, and other factors, such as size, severity, and coverage, are also extremely variable. A person’s exact symptoms vary depending on what type of psoriasis they have, though all types cause some kind of patch.
Most people with psoriasis have plaque psoriasis. Unlike some other forms, these patches have silvery-white scales coating their surfaces, which identifies them as plaques. They usually grow on the scalp, knees, elbows, and back, though they can develop almost anywhere. The white scales are dead skin that accumulates because the body is trying to produce new skin cells too quickly.
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