Arteries are blood vessels that carry blood from the heart to the rest of the body. Veins are those vessels, by which blood travels back to the heart. In order to perform its function, the veins in the legs work against the force of gravity. Contractions of muscles in the lower leg acts like a pump, while elastic walls of veins help blood to come back to the heart. Tiny valves in the veins opens and closes to prevent leakage of blood back.
There are number of factors which increasing the risk of developing varicose veins, among which the most important are: aging, female gender, genetics, obesity, and prolonged sitting, which prevents normal blood circulation.
For the formation of varicose veins may be ‘guilty’ several factors, such as aging and pregnancy. Aging of the veins results is losing its elasticity, which makes it expand. Also, over the years the valves become weaker, so blood leak back into the tissue, instead passes all in the heart.
Blood pools in the veins cause further spread out of veins, and so they become varicose. Veins are then look blue because they contain uncleaned blood without oxygen. (c) HealthDarts
Varicose veins and pregnancy
Varicose veins but can also occur by pregnant women, since pregnancy increases blood volume, and also slow down the flow of blood from the legs to the pelvis, as the body make better embryo development and growth.
Varicose veins can also occur during pregnancy for the first time or they can simply strengthen. Due to the increased weight of the uterus the pressure on leg veins is much bigger. Important role in the formation of varicose veins play as well hormonal changes in woman body. Varicose veins that occur during childbirth usually disappear or weaken within three to twelve months of birth.