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By Larry Kramer. Ice packs are used sometimes to treat muscle strains or sprains in different parts of the body. These packs if incorrectly used, can cause skin burns which may vary from mild such as first degree burns or more severe such as second and third degree burns.
Heat increases the blood flow to the area, and relaxes muscles. Donât use heat on an injury that has happened in the last 48 hours (an acute injury). There may still be bleeding into the area and heat will make this worse. Donât use heat as a preventative measure immediately after sport.ow to help heal an injury with ice. Use ice on acute injuries. An acute injury is one that you have done recently, e.g. if you have an ankle sprain or a pulled calf muscle.