Psoriatic arthritis commonly affects the back, fingers, toes, hips, knees, back of the heel and sole of the foot. The pain may be eased with over-the counter (OTC) pain relievers and NSAIDs (anti-inflammatories), but if needed, your doctor may give you a prescription.
https://www.arthritis.org/diseases/more-about/psoriatic-arthritis-treatments

