Psoriasis can differ by appearance. Pustular psoriasis causes blisters and pus-like patches. Intense swelling signifies erythrodermic psoriasis . Inverse psoriasis causes smooth inflamed patches, and psoriatic arthritis causes disabling pain in the hands and feet. Each type may require a different treatment plan.
Researchers describe psoriasis as an autoimmune skin disorder.
It is believed that psoriasis is hereditary. In fact, one in three people report a family history of psoriasis. But there are many documented cases where people with no family history of the disease developed psoriasis. Psoriasis is not contagious . If you have psoriasis, you are not alone.