Shanghai into the freezing mode, hot water bags and shine, hot water bag burns gradually increased, such burns two kinds. [One] is a hot water bag rupture hot water leakage scalding. [Preventive measures] after a summer old hot water bags are prone to aging, be sure to buy new good quality hot water bags. Secondly, do not flush with boiling water, do not flush too full. First aid】 cold water rinse or ice pack, cold towels and other cold compresses to reduce the burning pain while stopping the deepening of the wound. Even if the skin is broken can be so treated. The time can last until the burning pain disappears. Pay attention to keep warm to avoid getting cold or frostbite. 【Another】Low heat burns after prolonged contact with a hot water bag. 【Prevention】 Try to place the hot water bag far away before going to sleep. Especially after drinking, when sleeping deeper in a fatigued state. 【Treatment】Ineffective cold therapy, go to a specialist hospital before the blisters rupture.