1, general postoperative 1-2 days of cold compress method: refrigerator frozen special ice packs, or plastic bags sealed package of milk, etc., can be separated from the bandage wound gauze, placed on it. Effect: 1-2 days after surgery is the wound blood vessels are prone to bleeding, this time the ice can make the surgical site of blood vessels in the cold contraction, reduce bleeding, and is conducive to recovery. Precautions: postoperative or post-injury 2 days, not hot, but cold, which many people happen to get the opposite, the ice bag broken water, can not be used again, and the need for timely replacement of the wound dressing, so as to avoid infection. Time interval: ice each 15-20 minutes or so, every interval of 1-2 hours can be repeated ice, and the use of this time just can be frozen in the ice bag in the refrigerator. 2, 2 days later to hot compresses Method: hot water soak towel, wring dry to not running water, but also as long as possible to maintain the heat, and then into a household food bag, so as not to towel water, wet wound dressings. Or use a hot water bag can also be. Efficacy: hot compresses across the dressing can make the blood vessels dilate, promote venous return, accelerate the swelling. Note: Note that the towel and hot water bag should not be too hot to avoid burns. For the wound has nerve damage, local numbness of the patient should be extra careful. Pay attention to keep the wound dressing dry, once not deep wet, need to change the wound dressing in time to avoid infection. Time interval: every interval of 1 hour can be repeated hot compress. Each hot compress can be used for about half an hour. Finally, if there is any problem, please contact your doctor in time. 3, a bag of multi-purpose, easy hot and cold compresses in the supermarket to buy breakfast milk, that is, the kind of sachets of soft-packed refrigerated milk, pay attention to neither hard-packed, nor frozen into ice cubes, just refrigerated only. Then you can use it directly for cold compresses. When not cold, there is a refrigerator can be frozen Repeatedly, no refrigerator, you can drink directly to enhance nutrition. To the postoperative 2 days or more, hot compress can also can use this milk bag, but realize the need to soak in hot water, make it warmed up. (Note: the temperature must not be too high, so as not to scald) not compresses, the same can be used to increase nutrition. Cold compress can make subcutaneous capillary contraction, blood flow reduction, reduce local congestion, inhibit the sensory function of nerve cells, reduce pain, with cooling, hemostasis, pain relief, to prevent secondary infection and hematoma enlargement and so on.