Venous Reflux

What Causes Venous Reflux?

Venous reflux develops when the valves inside your leg veins become weak or damaged and no longer close all the way. Normally, these one-way valves keep blood moving upward against gravity on its way to the heart. When a valve fails, blood flows backward instead of toward the heart. This blood pooling raises pressure inside the vein and can cause it to stretch or bulge over time.

Several factors can raise your risk. A family history of vein disease is one of the strongest predictors, since weak vein walls and faulty valves often run in families. Age plays a role too, since vein tissue loses some elasticity over the years. Pregnancy, long periods of standing or sitting, extra body weight, and a past blood clot can all add pressure to your veins or affect valve function. Many patients have more than one of these risk factors at once.

Venous Reflux Symptoms in the Legs

This condition can cause a wide range of symptoms. Severity often depends on how long it has gone untreated and how many veins are affected.

Leg Pain, Heaviness, and Fatigue

A common early sign is leg heaviness, fatigue, or aching. This is most noticeable after standing or sitting for long stretches. Pooled blood raises pressure inside the veins and nearby tissue, so legs can feel tired or sore by the end of the day. Some patients also notice cramping or a throbbing feeling that eases when the legs are raised.

Swelling and Visible Vein Changes

As the condition gets worse, swelling around the ankles and lower legs often becomes more noticeable, especially by evening. Visible changes such as varicose veins, which look bulging and rope-like under the skin, or spider veins, which are smaller and closer to the surface, often go along with this swelling. These changes can signal that vein valves are no longer working the way they should.

Skin Changes From Venous Reflux Disease

Long-standing reflux can slowly affect the skin on the lower legs. You may notice a brownish or reddish discoloration near the ankles, dry or itchy patches, or areas of thickened skin. In more advanced cases, the skin can become fragile, and minor injuries may heal slowly, which can raise the risk of venous leg ulcers.

Superficial Venous Reflux vs. Deep Venous Reflux

This condition can affect different parts of the venous system. Knowing which veins are involved helps determine the best treatment approach.

What Is Superficial Venous Reflux?

Superficial reflux affects veins close to the surface of the skin, including the great and small saphenous veins. These veins act as a secondary path for blood returning to the heart. When their valves fail, it often shows up as visible varicose veins. A duplex ultrasound usually confirms this, and it tends to respond well to minimally invasive treatments that close the affected vein.

What Is Deep Venous Reflux?

Deep reflux involves the larger veins deep inside the leg. These veins carry most of the blood back to the heart, so they cannot simply be closed the way a superficial vein can. Treatment here usually focuses on improving blood flow and easing pressure, which can include treating any related superficial reflux to help reduce strain on the deeper veins.

Is Venous Reflux Dangerous If Left Untreated?

This condition is not usually a medical emergency. It is, however, a progressive one that tends to worsen over time without treatment. Early on, symptoms may be limited to mild heaviness or occasional swelling. If the valve damage goes untreated, rising venous pressure can lead to more serious problems, including skin discoloration, venous leg ulcers, and a lower quality of life from ongoing discomfort. Finding and treating the issue early can lower the chance of these complications and may make treatment simpler.

How Is Venous Reflux Diagnosed and Treated?

Diagnosing Venous Reflux With Duplex Ultrasound

A duplex ultrasound is the main tool vein specialists use to confirm this condition and see how severe it is. This painless imaging test combines standard ultrasound with Doppler technology to show blood movement in real time. During this process, called venous reflux mapping, a vein specialist checks both the superficial and deep veins in the leg to see which are affected, how serious the problem is, and whether other concerns, such as a past blood clot, are present.

We like to keep our patients informed throughout the diagnosis process, so you understand what the ultrasound shows and what it may mean for your treatment options before deciding on next steps.

Minimally Invasive Treatment Options

USA Vein Clinics offers several minimally invasive vein treatment options, all performed on an outpatient basis. Each is designed to close the affected vein and redirect blood flow through healthier veins nearby. Options include endovenous laser treatment (EVLT), which uses laser energy to seal the vein, and radiofrequency ablation (RFA), which uses controlled heat for the same purpose. VenaSeal is a medical adhesive that closes the vein without heat. ClariVein combines mechanical and chemical closure. Varithena is an ultrasound-guided foam treatment, and ultrasound-guided sclerotherapy uses an injected solution to collapse smaller veins.

Most of these procedures take well under an hour, and patients can usually return to normal activities the same day. A vein specialist can review your ultrasound results and symptoms to help decide which venous reflux treatment may fit your case. Related reading: our guide to venous reflux disease covers duplex ultrasound mapping in more depth.