Where the chest muscles that cover the ribs are sprained, rubbing and moist heat should be applied over the back and round the side where the sprain is, paying especial attention to the spine opposite the sprain, and using hot olive oil before fomentation and after, as well as to rub with. If the belly be sprained, similar treatment should be given lower down the back. If the back muscles are sprained, then the same treatment should be applied, taking special care to stimulate with moist heat and rubbing the part of the spine on a level with the injury, where the roots of the nerves lie which supply the sprained muscles. Care must ever be taken to avoid giving pain--to give pain is to increase the injury. To produce a glow of heat all through the parts is to cure it. (_See_ Muscular Pains.) For a sprained heel, when there is some degree of inflammation about it, we should pack the whole foot in fine soap lather. Let it be in this all night, and also during the day when resting. Wash the foot with a little weak acetic acid, after being packed in the lather, to keep it quite clean. Now rub the whole limb from the ankle upwards in such a way as to press the blood onwards in the veins. Use a little oil, so that the skin may not suffer till a fine heat is raised in the whole limb. This may be done for a quarter-of-an-hour twice or thrice a day. It relieves the heel of all congestion, and lets good arterial blood flow to it, as it would not otherwise. An elastic bandage, not very tight, put on above the knee will help the cure. Sprained joints and muscles should have _perfect rest_ for a fortnight, and be used very cautiously for some time longer.