Veins are the tubes in the cardiovascular system that guide and carry blood back to the heart. Veins begin in the capillaries and terminate in the atria. Small veins begin in the capillaries and gradually converge during the return to the heart to form medium veins, large veins, and finally into the atria. How do you diagnose persistent blood flow in the veins? The patient presents with soreness and weakness. Volumetric load test – can be used as a therapeutic reference for patients with high CVP who still have clinical signs of cardiac output insufficiency. If a rapid infusion of 500 ml of fluid within 20 min does not result in a significant increase in CVP or even a decrease; at the same time, blood pressure increases and heart rate decreases, this indicates that the patient has an absolute or relative volume deficit and that the heart has the potential to continue to receive large amounts of fluid; conversely, the infusion must be done with caution. The perforating veins, which connect the superficial veins to the deep veins, also have valves that prevent blood from flowing from the deep veins to the superficial veins; however, when the perforating vein valves fail to function, the blood flows at will and puts pressure on the superficial veins, which dilate. There are three more established treatment options, one is to slow the progression of the disease by taking good care of it in an appropriate healthy manner. The second is surgical treatment, which is performed when the disease is so severe that it affects the life (there are certain risks and it is usually the last option). The third is medication. At present, the more respected medication is the use of 3500 mg of high-dose 3-hydroxyethyl rutin treatment, both Furetrex rutin granules, which, too, is approved by the National Drug Agency.