Why do people get varicose veins?

There are many reasons for varicose veins, such as venous reflux, venous reflux disorders, congenital abnormalities, etc., standing for a long time, waiting for bad factors will lead to blood stasis, so that the veins are in a high-pressure state for a long time, causing venous valve damage, causing varicose veins. Women are also prone to varicose veins during pregnancy.