It is usually considered that the length of the foot soak at night is 15-30 minutes is optimal. Foot soak is now a way of health and relaxation chosen by many people, which has certain benefits for human health. Foot soak can speed up the body’s blood circulation, speed up the body’s metabolism, and have a certain role in removing dampness and detoxification for people with cold bodies. Foot soak time must be enough, generally recommended in about 15-30 minutes for the best, can effectively relieve the body’s fatigue, improve the quality of sleep. Soaking feet should not be too long, if the feet for a long time in the water, may cause insufficient blood supply to the heart, brain, kidneys and other important organs, but also destroy the sebaceous film on the surface of the skin of the feet, so that the cuticle dry, and even cracked. In addition, foot soaking should be noted that the water temperature should be less than 40 ℃ to avoid burns, while the foot soak water to not over the ankle is appropriate.