Hot therapy opens up blood vessels, which increases blood flow and supplies oxygen and nutrients to reduce pain in joints and relax sore muscles, ligaments, and tendons. The warmth also decreases muscle spasms and can increase range of motion. Applying superficial heat to your body can improve the flexibility of tendons and ligaments, reduce muscle spasms, and alleviate pain.

On the other hand, cold therapy slows down blood flow to an injury, thereby reducing pain and swelling. It slows circulation, reducing inflammation, muscle spasm, and pain. It should be used if the area is swollen or bruised.

Hence, before applying the therapy, you should think whether you use the correct therapy.