Recommended for muscular pain, strains, and joint stiffness. Can be used for back, hip, thigh, calf, arm, neck and shoulder pain. Therapeutic heat from the Deep Heat Pain Relief Heat Patch provides targeted pain relief right where you need it. Plus, penetrating heat helps relax stiff, sore, aching muscles and joints helping to restore movement. Heat increases blood flow to the affected area providing oxygen and nutrients to aid the healing process.