In the health care theory of traditional Chinese medicine, there are "foot massage all the year round: washing feet in spring, sunbathing and taking off; Washing feet in summer can dispel summer heat; Wash feet in autumn, moisten lungs and intestines; According to records, washing feet in winter, the abdomen is damp and hot, and there is an old saying in China: "It is better to take tonic when washing feet with hot water." If you soak your feet for 15 minutes every day, it can play a health care role. If you soak your feet in hot water at about 40 degrees Celsius, your headache will be obviously relieved after about 15 ~ 20 minutes.