There are many theories for why varicosities occur in veins, but the general conclusion is that the valves in veins are the cause.
Valves prevent the flow of blood going backwards through the vein. The vein’s function is to move blood moving toward the heart.
Some experts believe that inherited problems can cause people to have few valves or the valves not to function properly.
People can be born with complications in the vein wall. The abnormality will result in valves to separate and become leaky.
So, when a person with a badly functioning valves stands up the blood flow reverses and flows down to the superficial veins. It actually should be flowing to the heart.
Factors that Cause Varicose Veins:
- Prolonged standing.
- Overweight or distended stomach.
- Pregnancy is associated with a higher content of blood volume, thus pressing a chance to have varicose veins.
- Straining: basically any person who is straining for prolonged periods causes an increase in the blood flow to the leg veins which may result in varicose veins.
- Any surgery or trauma to the leg: any operation that interrupts the normal blood flow.
- The older you are increases your chances of getting varicose veins.