ELI5: Explain Like I'm 5

Hot pack

A hot pack is like a special blanket that you can put in the microwave or in hot water to make it warm. When you are feeling sick or have a sore muscle, you can place the hot pack on the part of your body that needs some comforting. The warmness makes the muscles feel better and can help to relax you. But be careful not to make it too hot, so that you don't burn yourself! It's like having a warm cuddle from a fluffly teddy bear.
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