Ice is an important part of joint loosening treatment, and its main principles are as follows: ice-cold stimulation leads to local capillary constriction, inhibits blood circulation, and reduces post-injury bleeding; local cooling inhibits the local level of the body’s own metabolism, reduces the accumulation of local inflammatory substances after injury, and reduces the inflammatory response; ice-cold stimulation inhibits nerve conduction and has the effect of increasing the pain threshold, which simply means reducing the pain The degree of pain. In summary, the role of ice is irreplaceable. After trauma and functional exercises with traumatic potential, it must be done promptly. Timely icing can minimize the degree of inflammatory response, reduce pain, prevent additional damage to functional training, and also create good tissue conditions for the next step of treatment. There are many ways to apply ice, the following are common: 1, disposable chemical ice bags; 2, silicone ice bags; 3, ice and water mixture; 4, cold therapy machine. The first, need to go out to buy, disposable non-reusable, convenient, but the temperature duration is short, and the cost of multiple use is not low, only for emergency use. The second, need to buy special, expensive, from the freezer after the temperature can be as low as minus a dozen degrees, directly placed on the skin will certainly cause frostbite, the ice pack across the object because of its low heat capacity, and soon return to room temperature, so the temperature is difficult to reach deeper tissue, the estimated effective depth of action is not more than a dozen millimeters, seemingly convenient to use in fact, the effect is limited, only for superficial injuries or emergency use. The third, the production of convenient and inexpensive, home refrigerator can be made by themselves, usually ice and water in a 1:1 ratio mixed in a plastic bag, directly on the surface of the skin ice, because the temperature is stable at 0 degrees Celsius, will not cause damage to the tissue, can be used with confidence. The use of ice is usually applied for 15-20 minutes each time, several times a day, as needed. The only disadvantage is that it needs to be made on the spot, so it cannot be used if it is inconvenient to go out. In No. 4, expensive professional treatment equipment is required, and the effect is equivalent to method 3, but it is not available, and not any treatment facility has such conditions. In summary, the most convenient to use the best results or ice and water method, low cost and most importantly, good results, it is recommended that we use widely. Note that in the case of using ice and water mixture, ice is usually in 15-20 minutes, not long and not short, this time just to conduct the temperature to the tissue location, too long ice can lead to reflexive vasodilation, but rather lose part of the original purpose of ice, and, after all, ice is to inhibit circulation inhibit tissue metabolism, too long is not conducive to tissue self-healing of inflammation, so ice must be implemented within a reasonable framework. Some patients ask: Can I apply hot packs or treatments with thermal effects to reduce swelling and pain? The answer is: If the temperature of the skin is significantly higher than normal in the area involved in the injury, it is not recommended or even strictly forbidden to apply heat and all treatments with thermal effects depending on the degree of local heat. Therefore, at this time, it is necessary for the patient to make an accurate assessment of his actual situation and make the right action. Note: When there is a wound on the affected skin, the use of ice-water mixture for icing needs to prevent water from leaking out and contaminating the wound.