The indications of cold therapy are mainly in the following aspects: 1, the effect is better for acute injury, such as local soft tissue contusion, or even fracture leading to limb swelling and pain or traumatic wound rupture bleeding, in the case of localized pressure bandage, can also be added to the cold therapy, can prevent further aggravation of limb swelling, but also can have a local hemostasis. 2, can be used for limb surgery After the wound or limb cold therapy, the effect is also better, usually can prevent the limb edema further aggravation, is conducive to the later recovery. 3, for acute inflammation, such as local joints of aseptic inflammation, or bacterial infection caused by local skin redness, swelling, heat and pain, the effect is also better.