Wrap the upper body in a blanket to avoid chilling. Using a large dishpan or the bathtub, immerse both feet and ankles in warm water. Keep adding hot water until it is as hot as can be tolerated. Place a cool washcloth on the forehead (keep the washcloth cool during entire treatment by wringing it out in cool water). Keep feet in the water for 10–30 minutes, depending on tolerance. As the water cools, add more hot water to maintain the hot temperature. After removing the feet from the water, rinse them with cool water and dry them thoroughly.