Inflammation May Be Behind Ps and PsA
Although there is no known cause for psoriasis or psoriatic arthritis, they are auto-immune diseases (a condition where your immune system mistakenly attacks healthy cells) and are tied to inflammation.
With plaque psoriasis, the skin cells renew faster than they should. This causes plaques to form on the skin.
With psoriatic arthritis, joint inflammation occurs, leading to stiffness, swelling, and pain.