Heat and ice are the two most common types of passive, non-invasive, and non-addictive therapies. Heat and cold can be used alternatively and are often used as a prelude to exercise therapy.
Heat and cold agents should always be used with caution. It is a good idea to seek the advice of a healthcare professional prior to use.
Heat Packs and Heat Therapy
Heat therapy induces vasodilation: drawing blood into the target tissues. Increased blood flow delivers needed oxygen and nutrients, and removes cell wastes. The warmth decreases muscle spasm, relaxes tense muscles, relieves pain, and can increase range of motion.
Heat packs in any form should always be wrapped in a towel to prevent burns. Punctured commercial heat packs should be immediately discarded, as the chemical agent/gel will burn skin.
Cold Packs and Cold Therapy (Cryotherapy)
Cold therapy produces vasoconstriction, which slows circulation reducing inflammation, muscle spasm, and pain.
Cold or ice should never be applied directly to the skin. A barrier, such as a towel, should be placed between the cold agent and the skin's surface to prevent skin and nerve damage. Punctured commercial cold packs should be immediately discarded, as the chemical agent/gel will burn skin.