Once a venous valve is damaged, it is irreversible, just like the aging process in humans, so self-repair of the valve is not possible. In cases where the valve is already in trouble, it can be improved by using elastic medical duties. After the diameter of the leg is restricted by elastic medical stockings, the distance between the valves is reduced due to vasoconstriction, and part of the valve can be restored to a certain function, together with drugs such as Avalanche or Mizarin, which can protect the elastic fiber layer of the valve, so that the elasticity and tension of the valve can be partially restored, so the function of the valve can be improved. Of course, if conditions permit, the valve can also be restored surgically, but the results are generally poor in this case.