Typical nail symptoms include pitting, grooving, and changes in texture. Thickening of the nails, changes in color, and nails that lift up from the nail bed can also occur.
Psoriatic arthritis can be symmetrical (affecting joints on both sides of the body equally) or asymmetric (affecting a joint on one side only). The severity of the disease can vary even in joints right next to each other.
In severe cases, people with psoriatic arthritis can have deformities, such as clawed toes or ankles that roll inward.
Psoriatic arthritis can also cause conjunctivitis in the eyes.
How is psoriatic arthritis diagnosed?
There isn’t a test to diagnose psoriatic arthritis, and doctors instead look at medical history as well as a physical exam. The first question your doctor will probably ask you is whether or not you have skin psoriasis. Your doctor will want to know about your symptoms and which joints are painful or swollen.
Lab and imaging tests might help eliminate other conditions. While there is no blood test for psoriatic arthritis, there are blood tests that can eliminate other similar-seeming conditions, such as rheumatoid arthritis.