Usage:
Use as the first time:
1. Hold the bag with one hand while press the hot button disc several times inside the bag with the pollex and forefinger of your another hand. The liquid shall turn to solid and release heat soon.
(do as the second time usage if the bag is solid )
2. You can press the bag face to make the bag flat and the heat can spread easily
3. Put the bag on the face where you need when its hot
Use as the second or more times
The bag shall turn cold after you make use of it for about 45 minutes. You should heat it in the boiled water for 3 minutes with cotton cloth or towel enwrapped. You can use it again after It turn to liquid. Be care of scald. Of course, we can put it into microwave(in a container completely with water would be better), heating it at medium heat for 40 seconds.
2. The liquid should turn cool and you can use it according to the step of the first use.

Precaution:
1. Dont puncture or abrade the bag with spiculate stick.
2. Dont press the button if the bag is releasing heat.
3. Turn to a doctor when necessary
4. NOT for eat and make it away from children.
Contents: Sodium acetate. Water
Non-toxic non-caustic