The knee showed all the signs of acute inflammation. A red skin that was hot to the touch and swollen.For the knee, it’s extremely easy. Stand in the shower with your leg exposed, and use the shower head to get the hot water over the affected area and breathe. Then next comes the test of will as you turn the dial back to cold. Remember to breathe, although usually there’s a sharp intake of breath when the cold water first hits your limb.