Diosmin is a drug to enhance venous tension and a vessel protectant.First of all for the venous system, this product by lengthening.The action of epinephrine on the venous wall causes contraction time, thereby enhancing venous tension;For the microcirculation system, this product can reduce the capillary permeability and enhance its resistance;For the lymphatic system, this product increases the speed of lymphatic drainage and lymphatic vasoconstriction, improves lymphatic reflux and reduces edema.