Varicose Veins in the Legs: Causes and Risk Factors
Varicose veins are associated with changes in the way the veins function and with various factors that affect blood circulation in the lower limbs.
In this article, we will discuss genetic predisposition, hormonal changes, pregnancy, age, a sedentary lifestyle, and excess weight, which are among the main factors associated with the development of varicose veins. Understanding these factors helps explain why varicose veins develop and which circumstances contribute to their progression.
Why Do Varicose Veins Develop in the Legs?
The veins in the legs contain valves that help direct blood toward the heart and prevent it from flowing downward. When these blood-flow structures become less effective, some of the blood remains in the lower parts of the legs, increasing pressure inside the veins.
Increased venous pressure promotes the progressive dilation of the veins, resulting in visible varicose veins on the surface of the legs. This process is associated with individual predisposition as well as different conditions that affect circulation.
Causes of Varicose Veins in the Legs
Family History
Genetics play an important role in the development of varicose veins. People with close family members who have venous disease have a greater predisposition to developing abnormalities in the valves and walls of the veins.
Genetics influence the structural characteristics of the venous system and establish a predisposition on which other factors act. For this reason, varicose veins also develop in young people who maintain healthy habits and have no other apparent risk factors.
Hormonal Changes
Hormonal changes affect the walls of the veins and are among the factors associated with the development of varicose veins. This relationship becomes particularly relevant during stages of life involving significant hormonal changes.
Hormonal changes are also associated with the development of spider veins, especially when there is a family history of venous disease or previous abnormalities in the venous system.
Pregnancy
As pregnancy progresses, the growing uterus puts pressure on the venous structures in the pelvis and makes it more difficult for blood to return from the legs to the heart. This combination promotes the development of varicose veins and spider veins, particularly in women with a genetic predisposition.
Pregnancy-related varicose veins require particular attention when they persist after childbirth, increase in size, or are accompanied by pain, swelling, or other discomfort.
Aging
Aging causes progressive changes in the walls and valves of the veins. Over the years, these structures lose some of their ability to facilitate the efficient return of blood to the heart.
These cumulative changes explain why varicose veins become more common with age. The risk increases when aging is combined with a family history, a sedentary lifestyle, excess weight, or prolonged periods of standing.
Risk Factors That Increase the Development of Varicose Veins
Sedentary Lifestyle
A sedentary lifestyle affects venous return because it reduces movement of the leg muscles. When walking, the calf muscles help move blood into the larger veins and support its circulation toward the heart.
Spending many hours sitting and keeping the legs still for prolonged periods reduces this muscular action and leads to greater blood accumulation in the lower limbs.
Standing for Long Periods
Standing for several hours places constant pressure on the venous system of the legs due to gravity. This situation makes it more difficult for blood to return to the heart and increases the workload placed on the veins.
This factor is particularly relevant for people who spend much of their working day on their feet, including healthcare professionals, teachers, salespeople, hairdressers, and customer service workers.
Overweight and Obesity
Excess weight increases the pressure placed on the venous structures of the lower limbs and is associated with greater difficulty maintaining efficient venous return.
Being overweight is also frequently associated with lower levels of physical activity, combining two factors related to the development and progression of venous disease.
Low Physical Activity
Regular physical activity promotes blood circulation in the legs through the contraction of the muscles in the lower limbs. Walking and exercises that involve leg movement keep this muscular function active.
A routine with little physical activity reduces this mechanical stimulus for much of the day and promotes conditions associated with venous insufficiency.
What Symptoms Can Accompany Varicose Veins?
Varicose veins produce symptoms that vary according to the severity of the venous disease. In addition to visible, enlarged veins, several symptoms are associated with blood accumulation in the legs.
- Heaviness or tiredness in the legs.
- Pain or discomfort.
- Swelling, particularly at the end of the day.
- Leg cramps.
- Itching or a feeling of tightness in the skin.
- Progressive changes in skin color and texture.
The presence of these symptoms together with enlarged veins is among the common manifestations of venous circulation problems in the lower limbs.
How Are Varicose Veins Evaluated and Their Cause Identified?
A venous Doppler ultrasound evaluates how the veins in the legs function. This examination shows blood flow and identifies abnormalities related to venous return and valve function.
The information obtained from this study complements the medical assessment and provides a detailed view of the venous abnormality. Based on these findings, the cardiovascular surgeon determines the appropriate management according to each patient’s condition.
Because varicose veins have different causes and associated risk factors, the presence of a visible vein alone does not determine the appropriate procedure. Treatment for varicose veins is selected according to the origin, extent, and characteristics of the venous problem.
Care from a varicose vein specialist provides an approach to the different manifestations of venous disease and establishes management according to each patient’s needs.
If you have symptoms of varicose veins or prominent, enlarged veins, a medical evaluation provides the appropriate diagnosis. If you are looking for an evaluation with a doctor considered the best cardiovascular surgeon in Peru, contact us. Dr. Paulo Huachalla will be pleased to assist you and answer your questions.
Visit our website to learn more about varicose veins, view photos of varicose veins, or learn about the cost of varicose vein surgery in Peru.