For moderate to severe pain from osteoarthritis, try applying heat and cold to the affected joints as appropriate. Experiment with these heat and cold techniques until you find what helps you most.
Paraffin wax is a form of moist heat that may help if you have pain and stiffness in your hands or feet. It is especially useful before exercise. Your physical therapist can teach you to use paraffin at home.
Citations
WebMD Medical Reference from Healthwise