In an unhealthy vein, blood circulation is poor because there are problems with the opening and closing of one-way valves that causes blood to fall backward in the legs, also known as blood pooling. It happens because blood flows in the wrong direction “reflux”, from the deep (within muscles) to superficial (near the surface) veins inside the legs.
Causes
This kind of disorder, where the valves are damaged, is caused by an increase in the vein’s blood pressure due to long periods of sitting or standing. When there is too much pressure, the veins stretch and the elastic walls weaken. There are certain risk factors that contribute as well, such as being overweight or obese, inactive, and especially if you are a woman.
Effect on