Psoriatic arthritis (PsA) is a form of arthritis that affects about one-third of people with psoriasis, according to the Arthritis Foundation. PsA is a chronic autoimmune disease that can ...

Psoriasis is a complex, chronic relapsing and inflammatory skin disorder with a prevalence of approximately 2% in the general population worldwide. Psoriasis can be triggered by infections, physical ...

A doctor may prescribe injectable treatments, such as methotrexate, TNF-alpha inhibitors, or interleukin inhibitors, for moderate to severe psoriasis when other treatments don’t work.