Self-massage is kneading your own sore joints, pressure points or muscles using your hands, knuckles, elbows or massage tools. Massage tools may be mechanized to offer heat or vibration, or you can create your own aids with household objects like tennis balls, says Field. Massaging hard-to-reach areas like your back may be difficult, but self-massage works well for sore feet, knees, calves, hands, neck or arms.