I dislike icing every time you throw but sometimes icing is necessary. Sometimes it relieves edema which is basically inflammation that doesn’t go away because it’s irritated by its own inflammation. Here’s a recipe for making a homemade reusable ice pack.
3 Parts Water
1 Part Rubbing Alcohol
2 Freezer Ziploc Bags
Mix water and rubbing alcohol in freezer bag leaving 1 1/2 inches between mixture and top of bag.
Zip-loc bag and put inside 2nd bag and fold top of bag over and lay flat in freezer to freeze.