Tips for hot/cold packs

Hot / cold packs are commonly used for relieving pain and discomfort. 
Here are some important things to keep in mind:
Do not apply hot / cold packs directly to the skin as it may cause burns or frostbite.
Do not use hot / cold packs for more than 20-30 minutes at a time.

If you have any medical conditions or injuries, consult your doctor before using hot / cold packs.