Hot Water Bag is a bottle filled with hot water and sealed with a stopper that is used to provide warmth typically while in bed. These are used also for the application of heat to specific parts of the body. These are usually used to relax the muscles by giving them the required heat. These help eliminate muscle pain, cure sprains, and many more. This Hot Water Bag is a completely safe device that can be easily used at home and doesn't require any medical supervision from any professional. These can lead to certain side effects including skin burns, cuts, and wounds.