Refers to the method of alternately bathing and soaking the body with hot and cold water. Referred to as "hot and cold water bath". Hot and cold water bath has strong exercise value. It is the embodiment and application of "cold and hot water effect" in human physiology, and it is a scientific health preserving method.

Cold water refers to water with low temperature. Language metaphor encounters an accident or fails to plan; The opposite effect.

Second, hot water is boiled water or water with boiling point.

Third, warm water can generally refer to cold water that is not fully heated, and the water that is neither cold nor hot is touched by hand, generally at 40-60 degrees;

The magical use of cold water:

1, stop nosebleeds: When nosebleeds, you can use a towel to soak your forehead in cold water to stop bleeding.

2, vision: eyes like cold and afraid of heat, wash your face with flowing cold water, then your mind is clear and your eyes are bright. Persistence all the year round can not only reduce trachoma, but also protect eyesight and enhance the resistance of eyes to diseases.

4, treatment of sprain: sprain and contusion of limbs, local congestion or swelling, can be immediately soaked in cold water, can make the broken blood vessels close faster, 5, control hematoma aggravation, and stop bleeding and relieve pain.

6, cold: adhere to the cold bath and wash your face with cold water, can enhance physical fitness, enhance pit cold, prevent colds.

7, treatment of toothache: toothache, you can constantly contain cold water in your mouth, that is, it has analgesic effect.