For tennis elbow, runner's knee, and similar injuries, try R.I.C.E. – rest, ice, compression, and elevation. Rest means that the injured area is not put through any undue strain. When icing a body part, apply the ice in a covering so that it is not in direct contact with the skin. A cotton handkerchief covering the ice is helpful. Ice the affected area several times a day, for about 20 minutes at a time. Compression is applying pressure to the injured area to stop bleeding (if any is occurring) or to reduce swelling. Elevation helps in these respects as well. Compression and elevation are to be used in the case of acute injuries, such as a twisted ankle.