The main reason for the development of varicose veins in the lower limbs is the defective venous valves. Anatomically speaking, the human body itself has a lot of venous valves in the lower limbs of both limbs, and there are defective valves or weak venous walls, coupled with high venous pressure, the main these three factors lead to varicose veins in the lower limbs.
Varicose veins are the veins that are tortuous and dilated due to stagnation of blood, weak vein closure and other factors, and the veins in many parts of the body can be varicose, the most common part is in the lower limbs.
Why do varicose veins tend to occur in the lower limbs?
Because of increased pressure. People are from reptiles to standing animals, standing determines the high pressure of the veins of the lower limbs, as long as there is the existence of this high pressure, the closer to the ground, the higher the pressure, so this is a gravity effect, as long as this pressure increases, it is possible to lead to varicose veins, in addition to varicose veins of the lower limbs there is also a very obvious genetic predisposition, it is necessary to emphasize that it is not necessarily hereditary, but only the patient's offspring of the incidence of increased chances, in addition, can also be used as the basis for the development of varicose veins. In addition, diseases that can cause high pressure may also cause varicose veins of the lower extremities, which is a chronic disease. There is no conclusion as to which diseases can induce it, but there are some cases, such as long-term chronic cough, long-term chronic constipation, and long-term coughing in the elderly, which cause increased pressure in the lower extremities and are prone to varicose veins. The same is true for people with chronic constipation, which has a high incidence.
Chronic heart failure, diseases of the inferior vena cava, etc., which can lead to abdominal hypertension, lower extremity venous pressure increased in some special ways of work, is also easy to induce varicose veins of the lower extremities. For example, if a teacher goes to the stage to give a lecture, a lecture is a few hours, must stand to speak, this kind of work style decided to easily produce varicose veins of the lower limbs. Standing for a long time is not necessarily a varicose veins of the lower limbs, but it will be higher than the incidence of some other groups of people, so that standing for a long time is a contributing factor, the actual onset of the factors should be analyzed according to their own situation, the venous valves of the functional defects and the venous wall is weak is the two most fundamental reasons, other situations are just a contributing factor, that is, the external causes through the internal causes of the change.