Psoriasis occurs when faulty signals in the immune system cause new skin cells to grow too quickly, in days rather than weeks. The body does not shed these excess skin cells, so the cells pile up on the surface of the skin, forming lesions.
Individuals with psoriasis are at an elevated risk to develop other chronic immune conditions, such as inflammatory bowel disease and diabetes.
People with more severe cases of psoriasis have an increased incidence of psoriatic arthritis, diabetes, cancer, depression, and other immune-related conditions such as Crohn's disease.
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