Do Instant Cold Packs Work

These packs have two bags inside them; one has a chemical such as calcium ammonium nitrate and the other has water. To use instant cold packs you have to hit or shake the package, which makes the bags break and substances combine. This in turn creates an endothermic reaction which makes the whole thing good and cold.

When should cold packs be used?

If you have had a recent injury (within the last 48 hours) where swelling is a problem, you should be using ice. Ice packs can help minimize swelling around the injury, reduce bleeding into the tissues, and reduce muscle spasm and pain. Ice packs are often used after injuries like ankle sprains have occurred.

Why does ice reduce inflammation?

Using a cold compress or ice pack on a strained muscle can decrease inflammation and numb pain in the area. Icing is effective at reducing pain and swelling because the cold constricts blood vessels and decreases circulation to the area.