Exploring the Causes and Symptoms of Varicose Veins

Varicose veins are quite common, particularly among women. Many patients seek varicose vein treatment near Houston because of cosmetic concerns. However, it’s important to realize that if left untreated, varicose veins may sometimes result in health complications. These may include a venous ulcer or the formation of blood clots. If you suspect you may have noticed the signs and symptoms of varicose veins, you can consult a doctor who specializes in vascular conditions.

Signs and Symptoms

Most often, patients notice the signs of varicose veins in the legs. They can be indicated by gnarled and enlarged veins that are visible beneath the skin. They may appear to have a dark purple or blue color. The area around the visible veins may itch. Sometimes, patients also experience pain or discomfort in the area. You may suffer from aching or a heavy feeling in the legs. Or, you may report muscle cramping, swelling, throbbing, or burning sensations, especially in the lower legs. The pain may become worse when you sit or stand for a long period of time.

Causes and Risk Factors

The Main Causes of Varicose Veins

The basic mechanism, failing valves that let blood fall back down the leg, is the same in almost everyone. What differs is why the valves failed in the first place. Doctors group varicose veins into two broad types, and the distinction matters because it changes how we look for the cause.

Primary varicose veins

Most varicose veins are primary. The vein wall and its valves are inherently a little weaker than average, often for genetic reasons. Over years of standing and walking, the wall stretches, the valve leaflets drift apart and reflux begins. It usually starts at a junction where a surface vein joins a deep vein, such as the groin or behind the knee, and then works its way down the leg as each successive valve is overloaded.

Secondary varicose veins

Secondary varicose veins develop because something else has damaged the vein system. The most common cause is a previous deep vein thrombosis, which can scar the deep veins and their valves. Pressure on the pelvic veins, for example from pregnancy or, rarely, from a narrowed iliac vein, and pelvic vein reflux can also send blood into the leg veins and create varicose veins in unusual places such as the inner thigh, buttock or vulva.

Risk Factors That Make Varicose Veins More Likely

Beyond age and pregnancy, several factors raise the chance of developing varicose veins or make existing ones worse:

• Family history. This is one of the strongest predictors. If one or both parents had varicose veins, your risk is considerably higher.
• Female sex and hormones. Estrogen and progesterone relax vein walls, which helps explain why women are affected more often, and why symptoms can change with the menstrual cycle, birth control or menopause hormone therapy.
• Long hours of standing. Nurses, teachers, hairdressers, retail workers, chefs and factory workers all keep vein pressure high for most of the day.
• Prolonged sitting. Desk work and long drives reduce the calf muscle pumping that normally moves blood upward.
• Excess body weight, which increases pressure in the abdomen and therefore in the leg veins.
• Previous leg injury or blood clot, which can damage valves directly.
• Being tall, which means a longer column of blood for the valves to support.
• Low activity levels and weak calf muscles.

Patients sometimes ask about crossing their legs or wearing high heels. Neither has been shown to cause varicose veins, though high heels reduce how well the calf muscle pumps.

Symptoms of Varicose Veins Beyond the Visible Veins

Many people think of varicose veins only in terms of appearance. In clinic we see that the size of the veins often has little to do with how much they bother someone. Some patients with large, ropey veins feel very little, while others with modest veins have significant aching. A few symptoms deserve more attention than they usually get:

• Restless legs at night. An urge to move the legs in the evening can be linked to vein reflux in some people. Our restless leg syndrome page explains the connection.
• Night cramps in the calves or feet.
• Ankle swelling that leaves sock marks and improves overnight.
• Skin changes such as brown staining, dryness, eczema-like rash or tight, hardened skin above the ankle.
• Clusters of tiny veins around the ankle or foot, sometimes called a corona phlebectatica, which often signal more advanced reflux.

A useful pattern to recognize is that vein symptoms usually worsen as the day goes on and improve with walking, elevation or compression stockings. Pain that behaves differently, for example pain in the calf that comes on with walking and stops with rest, points more toward an arterial problem.

Varicose veins in unusual places

Most varicose veins appear on the inner thigh, the inner calf or behind the knee, following the paths of the great and small saphenous veins. Veins that appear on the back of the thigh, the buttock or the vulva, or that appear after several pregnancies, sometimes come from the pelvic veins rather than the leg veins. Recognizing this pattern matters, because treating only the leg veins in that situation often leads to early recurrence.

How Varicose Veins Progress Over Time

Varicose veins tend to progress slowly. Not everyone moves through every stage, but the general pattern is predictable. Vein specialists use a classification called CEAP to describe it; a simplified version is shown below.

The earlier reflux is identified, the easier it is to treat and the more likely it is that skin damage can be avoided. You can read more on our venous insufficiency page.

Complications of Untreated Varicose Veins

As mentioned above, varicose veins can lead to venous ulcers and blood clots. Those complications usually develop over years, but it helps to know what each looks like:

• Superficial thrombophlebitis. A varicose vein becomes hard, red, warm and tender because a clot has formed inside it. It is usually not dangerous on its own, but it can extend into a deep vein, so it should be checked with an ultrasound.
• Bleeding. Thin-walled veins near the ankle can bleed heavily after a small knock or even in the shower. Lying down, raising the leg and pressing firmly on the spot usually controls it.
• Skin damage. Chronic swelling and inflammation can darken and harden the skin, making it fragile.
• Leg ulcers. Open wounds, usually above the inner ankle, that heal slowly while the vein pressure stays high.

How We Evaluate Varicose Veins

Because varicose veins are a symptom of an underlying valve problem, the first visit focuses on finding where the reflux starts, not just on the veins you can see.

1. Focused history. We ask about your symptoms and how they change during the day, your work, pregnancies, family history, previous clots, medications and what you have tried so far.
2. Standing examination. Veins fill and show their pattern best when you stand, so we examine both legs upright and look at the skin around the ankles.
3. Venous duplex ultrasound. Performed in our IAC-accredited vascular lab, this scan maps the surface and deep veins, shows which valves leak and rules out old or new clots. If pulses are weak, we may add an ankle-brachial index to check the arteries.
4. A clear plan. We explain the findings in plain terms, whether treatment is medically necessary or optional, and which procedures would address the source of the problem.

What to bring to your first visit

• A list of your medications, especially blood thinners and hormones
• Details of any previous vein procedures, blood clots or leg injuries
• A note of how long you have worn compression stockings, if at all, since many insurance plans ask about this
• Loose shorts or clothing that makes it easy to examine and scan the legs

Treatment Options for Varicose Veins

Treatment aims to close or remove the faulty veins so that blood reroutes through healthy ones. The choice depends on the size and location of the refluxing vein seen on ultrasound.

• Compression stockings relieve symptoms and are often the first step, but they do not repair the valves.
• Endovenous ablation closes a large refluxing vein from the inside using heat or a non-thermal method. See our radiofrequency ablation page.
• Ambulatory phlebectomy removes bulging branches through tiny skin nicks.
• Sclerotherapy and foam sclerotherapy close smaller or tortuous veins with an injected solution.

These are office procedures under local anesthesia. Most patients walk out afterward and return to normal daily activities within a day or two, with some tenderness and bruising for a week or so. Our main varicose vein treatment page covers each option in detail.

Can You Prevent Varicose Veins?

You cannot change your genes, but you can reduce strain on your veins and slow progression:

• Walk regularly and do calf raises; the calf muscle is the main pump that moves blood out of the legs
• Break up long periods of standing or sitting every 30 to 60 minutes
• Raise your legs above heart level when resting
• Maintain a healthy weight
• Wear graduated compression stockings on long workdays or flights, especially if you already have symptoms

When to See a Vein Doctor in Houston

If your legs ache or swell by the end of the day, if veins are getting larger or more uncomfortable, or if you notice skin changes around your ankles, it is worth being assessed by a vein doctor in Houston. Dr. Syed Raza is a fellowship-trained interventional radiologist with more than 15 years of experience treating varicose veins and venous reflux. Same-week appointments are usually available, and most insurance plans, including Medicare, are accepted.

Frequently Asked Questions

Are varicose veins hereditary?

Family history is one of the strongest risk factors for varicose veins. If your parents had them, you are more likely to develop them, often at a younger age, although lifestyle factors such as standing work and weight also play a role.

Do varicose veins always cause symptoms?

No. Some people have large varicose veins with little discomfort, while others have smaller veins that ache, swell or itch. Symptoms and visible size do not always match, which is why an ultrasound is used to judge how significant the reflux is.

Can men get varicose veins?

Yes. Varicose veins are more common in women, but many men develop them too, particularly those with a family history or jobs that involve long hours of standing. Men often delay seeking care until symptoms or skin changes are more advanced.

Why do my varicose veins hurt more in hot weather?

Heat causes veins to widen, which allows more blood to pool in the legs and increases pressure on already weak valves. Many people notice more aching and swelling in summer, which elevation, walking and compression can ease.

Will exercise make my varicose veins worse?

Regular exercise such as walking, cycling and swimming usually helps by strengthening the calf muscle pump. Very heavy lifting with prolonged straining can temporarily raise vein pressure, so it is best kept moderate if your veins are symptomatic.

Do varicose veins come back after treatment?

A vein that has been successfully closed rarely reopens, but new varicose veins can develop over time because the underlying tendency remains. Follow-up scans when symptoms return and healthy habits help keep results lasting.

Can varicose veins go away on their own?

Varicose veins caused by valve failure do not go away on their own, although veins that appear during pregnancy often improve after delivery. Compression, exercise and elevation can ease symptoms, but closing the faulty vein is the only way to remove it.

Trusted Health Resources

1. Chronic Venous Insufficiency, Society for Vascular Surgery
2. Venous Insufficiency, MedlinePlus Medical Encyclopedia (NIH)
3. Varicose Veins and Spider Veins, MedlinePlus (NIH)