Soaking feet with cold water in winter is very harmful to the body, which will lead to vasodilation dysfunction, induce limb spasm, arthritis and rheumatism, and directly cause low back and leg pain. Female friends will also have irregular menstruation and amenorrhea. If female friends soak their feet in cold water during menstruation, it will lead to poor menstrual flow and severe abdominal pain. On the contrary, if they soak their feet in hot water for a long time, they can dredge the meridians and promote blood circulation, which can not only relieve fatigue, but also help them sleep, and finally achieve the purpose of health care. If some Chinese medicines are added to the foot bath water, the effect will be better.