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How can psoriasis be linked to psoriatic arthritis?

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Psoriasis is an immune-mediated inflammatory skin condition characterized by raised red plaques with silvery scales. It is linked to psoriatic arthritis—a specific form of inflammatory joint disease—in approximately 10 to 30 percent of affected individuals.1

The two conditions are connected through their shared inflammatory nature. While the exact mechanisms of this progression are complex, psoriatic arthritis typically develops years after the onset of psoriasis. In some instances, however, the arthritis may precede the skin symptoms, or both conditions may manifest simultaneously.1

Psoriatic arthritis is classified as a spondyloarthropathy, a group of conditions that often involve inflammation of the spine and peripheral joints. While psoriasis itself is a proliferative and inflammatory disorder of the skin, the associated arthritis can lead to joint pain, swelling, and, in severe cases, bone destruction. Because both conditions involve systemic inflammation, individuals with extensive skin involvement or a family history of the disease may require more aggressive medical management.12