Severe psoriatic arthritis of both feet and sulfasalazine juvenile rheumatoid arthritis. Note the changes to the nails.
This type does not occur in the same joints on both sides of the body and usually only involves fewer than 3 joints. This condition can progress over months or years causing severe joint damage. Nail changes are often marked. Pain, swelling, or stiffness in one or more joints is commonly present in psoriatic arthritis. Psoriatic arthritis is inflammatory, and affected joints are generally red or warm to the touch.