Quick Answer: When it comes to treating injuries, two of the most commonly recommended therapies are ice and heat. Whether you're dealing with a sprained ankle, a sore back, or a muscle strain, ice and heat are often used to relieve pain and promote healing. But what’s the science behind these therapies? How do they work, and when is it best to use one over the other? Let’s explore the evidence behind ice and heat therapy to help you make informed decisions for your injury care.