The advantage of taking a cool bath is that it can promote blood circulation and refresh the mind; the disadvantage is that arthritis patients are prone to joint pain and so on. Cool bath when the skin is stimulated will accelerate the contraction, the blood will flow to the deep visceral parts, can promote blood circulation; and the sympathetic nervous system in the body by the cool water stimulation will be secreted after norepinephrine, to give a person refreshed and awake the feeling of the brain. But cool water bath water temperature is low, easy to cause cold hands and feet, arthritis or trigger joint pain. The premise of the cool bath is its own physical quality is too hard, no other diseases, then the appropriate cool bath does not have too much harm, but also to enhance the body’s ability to resist the cold; if it is weak and sickly cool bath will only exacerbate the condition, reduce resistance, especially with cardiovascular disease or drinking alcohol must not take a cool bath, otherwise it will increase the resistance of the blood circulation leading to life-threatening. Cool bath is best step by step, the water temperature control at 10 ℃ is appropriate, do not overly pursue stimulation, and the shower time should not be too long, 20 minutes or so can be. If you feel uncomfortable in the cool bath immediately stop rinsing, if necessary, timely medical attention.