If the calf is cold, it will cause blood stasis, just like "freezing", it will be difficult for qi and blood to go down, and it will turn to stasis in the pelvic cavity and form fibroid cysts.
Venous return in the leg is mainly contracted by the calf muscles. The cold main retraction and coagulation stagnation directly affect the contractile function of the calf muscles, resulting in the difficulty of venous blood returning to the heart, and in the long run, it is easy to induce heart disease.
People have "four roots" (ear roots, nose roots, milk roots, and foot roots), and the heel is the foundation of the "four roots". Cold calves will affect the transmission of instructions between the legs and the brain, and then affect the health of the whole body.