The MEDVICE large hot and cold pack can be used for both hot and cold compress. Cold therapy is key for swelling, headaches, toothaches, sport injuries, and fevers. Hot therapy is helpful for arthritis, muscles aches, menstrual cramps, joint stiffness, and muscle spasms. This reusable hot and cold gel ice pack is ideal for all types of pains, aches, and injuries to get fast pain relief.