What are the benefits of washing feet to the human body?

Many long-lived old people and scholars at all times and at home and abroad believe that washing feet often is good for health. There is a folk song that says: "Wash your feet in spring, and the sun rises and takes off;" Washing feet in summer can dispel summer heat and dampness; Wash feet in autumn, moisten lungs and intestines; Wash your feet in winter and your abdomen is warm; Wash your feet before going to bed and sleep soundly; Travel to wash feet and relieve fatigue. "Washing feet does have many benefits. Washing feet often can make people refreshed and feel comfortable, and can also prevent various skin diseases. Washing feet with hot water in winter can promote local and systemic blood circulation and prevent frostbite. Washing feet in hot summer can replenish qi and relieve summer heat, making you feel comfortable and cool. After walking or working for a long time, scalding feet with hot water can promote blood circulation, eliminate fatigue and prevent numbness of limbs. Washing feet before going to bed produces a good and gentle stimulation to the central nervous system, which promotes the cerebral cortex to enter a state of inhibition, and sleeping is particularly sweet. Su Dongpo, a great poet in the Song Dynasty, has a famous poem. " Master advised me to wash my feet and sleep, and then smell the bells and drums when I got out of bed. "Write vividly. Washing feet before going to bed is an ideal physical therapy for insomnia.