Harmful to the body. When taking a cold bath, the human body will feel cold because the water temperature is too low, resulting in a series of stress reactions, such as rapid heartbeat, high blood pressure, muscle contraction, nervous tension and so on. It can not only eliminate fatigue, but also easily cause colds and should be avoided as much as possible. Especially for women, due to their special physiological reasons, especially during menstruation, lactation and pregnancy, the stimulation of cold water will cause endocrine disorders, amenorrhea and abdominal pain, and many bacteria will also enter the vagina to cause gynecological diseases such as vaginitis, which will seriously affect women's future pregnancy and health. It will also lead to different diseases because of different personal constitutions.