The use of heat is effective in treating conditions that are more chronic in nature. It is not recommended that heat be used within the First few days or weeks of a new injury, especially when any signs of swelling are present. The best forms of heat are in the form of a warm bath/shower or a moist heating pad. Avoid "dry" heating pads, as they can promote additional swelling and inflammation. As with ice therapy, apply the heat for a maximum of 20 minutes per hour. Never go to sleep with a heating pad, as this can result in increased pain and tissue damage.