Tests for Psoriatic Arthritis

There is no good blood test to show that a person has psoriatic arthritis.  Instead the doctor looks at your skin to see if there are any skin findings related to the arthritis and X-rays can show changes in the joint that are typical of psoriatic arthritis.  Sometimes, doctors do a CT scan of the spine and pelvis to see arthritic changes.  Other tests that can be done include MRI scans of the joints.