Valve defects: When the small valves in the veins that help blood flow from the legs to the heart weaken, blood flows back down and builds up in the veins. This is the main reason for swollen veins.
Standing or sitting for long periods of time: People who stand or sit in the same position for many hours due to work (for example, teachers, sales people) have a slower blood flow in the legs, which can lead to varicose veins.
Age: As we age, the elasticity of the veins decreases and the valves weaken.
Pregnancy: During pregnancy, the amount of blood in the body increases and the uterus puts excessive pressure on the major veins in the legs, which leads to varicose veins.
Genetics: If someone in the family has this disease, the risk of developing it is higher.
Being overweight: Being overweight puts more pressure on the veins in the legs.
Gender: This problem is more common in women than men. Hormonal changes are a major cause.
