MSN: Cold vs heat therapy for pain relief: A complete guide to safe and effective use Cold vs heat therapy for pain relief: A complete guide to safe and effective use Health.com: Ice vs. Heat for Pain: Which Is Best for Your Injury? Ice helps reduce swelling and pain by narrowing blood vessels and limiting blood flow.

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You can use heat to relax tight muscles and improve blood flow after 48-72 hours of injury. Applying ice for ... 10 News: Knoxville seniors find relief in community during East Tennessee heat advisory