The indications for hot compresses are as follows: 1, frostbite of the soft tissues of the skin. 2, poor circulation in the limbs or body parts leading to a decrease in local skin temperature, may also be due to shock and lead to a decrease in skin temperature, hot compresses can relieve local symptoms. 3, traumatic bruising of the limbs, and so on, after the acute stage can be used to promote local blood circulation, accelerate the disappearance of local bruising and pain. 4, chronic aseptic inflammation of the limbs can also be used to promote blood circulation, accelerate the absorption of inflammatory tissues or inflammatory factors, thus relieving chronic pain. 4, chronic aseptic inflammation of the limbs can also be used to promote blood circulation, accelerate the absorption of inflammatory tissue or inflammatory factors, which can relieve chronic pain.