Follow these steps to make an ice pack:

• Put about 1 lb (0.5 kg) of ice in a plastic bag.
• Add enough water to barely cover the ice.
• Squeeze the air out of the bag, and seal it.
• Wrap the bag in a damp towel, and apply it to the painful area.
• Use the ice pack for up to 15 minutes at a time.

You can make cold packs from items found in your freezer, or you can buy commercial cold packs.

• Ice bags or bags of frozen peas are inexpensive, last 10 to 20 minutes, and mold well to your body.
• Cold packs (vinyl-coated silica gel) are lightweight, mold to your body, and last for 20 to 30 minutes. (If the chemical inside leaks out, you may get a chemical burn.)