With the bumps and bruises of real life, particularly if you have kids, ice packs are a necessity. You can buy a commercial ice pack or you can make one of your own to keep in the freezer.
This one is flexible and kind of slushy, and will work really well to conform to the injury. Here is how you do it:
Take a zip lock bag - freezer zip lock bags are a little sturdier and better. Use the size that you want your ice pack to be.
Pour two cups of water into the bag.
Add 1/3 cup of rubbing alcohol to the water.
Zip up the bag and put it in the freezer. By morning it will be a nice ice pack. You can keep it stored in the freezer until you need it.
The alcohol keeps the mixture slushy and flexible. Use the pack to diminish bruises and calm down other bumps, bruises and everyday hurts that we all get into.
Warning: Only keep the ice pack on the injury for 10 minutes at a time. Then leave it off the injury for at least 20 minutes before reapplying.
So, that's how you do it. Hope you never need it!