Ice bath can increase the elasticity of blood vessels, thus effectively preventing cardio-cerebrovascular diseases. When the skin is stimulated by ice bath, the blood vessels will rapidly contract and a large amount of blood will flow to the body. After the body adapts to the water temperature, the blood vessels will stretch and contract to increase the elasticity of blood vessels, thus playing a role in preventing cardio-cerebrovascular diseases. Proper ice bath can increase the body's ability to adapt to the temperature, especially to adapt to cold air, Therefore, when the temperature changes from cold to hot, it can prevent colds well. Ice bath can make the skin shrink and expand, promote blood circulation, thus enhancing skin nutrition, making the skin elastic and not prone to skin diseases. Do not take ice bath immediately after exercise or after the body sweats heavily. People with high blood pressure, heart disease, and just finished drinking cannot take ice bath.