Heat is also helpful to decrease stiffness and relieve pain. Superficial heat, such as provided by liniments and ointments, etc., do not deliver heat deep enough to be beneficial. The best is a hot water bottle or hot packs because the temperature can be controlled and they deliver a significant amount of heat deep into the joint. Use of a heated whirlpool or spa may also be helpful. Use of a heating pad can be helpful, but care must be taken to avoid burning the skin.