Psoriasis is an autoimmune condition characterised by thick, flaking patches of skin that causes inflammation. During the normal skin cycle, cells grow and are replaced every four weeks, but this process is more rapid in those who have psoriasis. Instead of the process taking weeks, it can take only a few days for skin cells to come to the surface. This rapid movement causes them to accumulate and form thick patches on the scalp, hands, feet, elbows, or back. While the patches can be mild, it is possible for them to come together to cover a large area of skin.
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