Temporary relief of minor muscle pain, joint pain, arthritis, muscle spasm; relieving stiffness and promoting relaxation of muscle tissue and temporarily increasing local blood circulation where heat is indicated. PainBuster is an OTC portable-lightweight device intended to non-invasively manage a variety of acute and chronic musculoskeletal conditions in 20 minutes once or twice a day. It is simple to get started with your PainBuster journey. Also read the PainBuster Reviews by our customers who have loved the product and found easy-to-use features for relieving ankle pain and highly recommend Painbuster to everyone.