Chronic venous insufficiency, also known as chronic venous disease, is a circulatory problem characterized by the inhibition of oxygen-poor blood flowing upward from the legs to the heart. This problem causes stasis, which refers to the pooling of the blood in the veins. Many patients with venous insufficiency also seek treatment for varicose veins in Houston.
Quick Answer: Chronic venous insufficiency (CVI) is a long-term condition in which damaged valves in the leg veins let blood flow backward and pool, keeping pressure in the lower legs too high. It causes aching, heaviness, swelling, varicose veins and, over time, skin discoloration and ulcers. CVI is diagnosed with a venous duplex ultrasound and is usually treated with compression plus a minimally invasive office procedure that closes the faulty veins, with most patients walking out the same day.
Meet your vein specialist
Dr. Syed Raza, MD
Vascular & Interventional Radiology · Founder, Premier Vein & Vascular Center
Fellowship-trained interventional radiologist certified by the American Board of Radiology and the Royal College of Radiologists (UK). Former Chief of Interventional Radiology at UTMB Galveston and Memorial Hermann Memorial City, with 15+ years treating varicose veins, venous reflux and peripheral arterial disease.
Typical Symptoms
Patients with venous insufficiency can develop a range of symptoms that affect the legs. The condition may cause swelling of the ankles and a tight feeling in the calf muscles. Some patients describe the sensations in their legs as feeling like heaviness, restlessness, achiness, or tiredness. When patients suffer from pain, it typically occurs while they are at rest or just after they stop walking.
Potential Complications
Varicose veins are closely associated with chronic venous insufficiency. Because the blood cannot flow upward toward the heart properly, it can accumulate in the lower body. This causes the veins to become enlarged, gnarled, and visible. In turn, varicose veins may increase a patient’s risk of skin rashes, sores, and redness. The pressure from the accumulated blood can contribute to leg swelling. In response to chronic venous insufficiency, the lymphatic system may produce excessive amounts of lymph. Some of the lymph may be absorbed into the surrounding tissues, which exacerbates leg swelling and may contribute to the formation of venous ulcers.
Possible Causes
There are several risk factors that make people more likely to develop chronic venous insufficiency. We know that genetics is a very common one. Direct family history of venous insufficiency (parents or siblings) makes you much more likely to develop it yourself. Other risk factors include:
- Obesity
- Standing Professions
- Gender (women are more likely then men)
- Multiple pregnancies
- Heavy lifting
- Another possible cause of chronic venous insufficiency is deep vein thrombosis (DVT). DVT refers to the formation of a blood clot in one of the deep veins of the body. DVT is most common in the legs. Since a blood clot can obstruct blood flow through the vein, the blood can back up, increase localized blood pressure, and overwhelm the valves within the veins. The valves can stretch and fail to operate as they should, which causes chronic venous insufficiency. Another possible cause is phlebitis, which refers to the swelling and inflammation of a blood vessel. This can trigger the formation of a blood clot.
Treatment Options
Patients may try lifestyle modifications to manage chronic venous insufficiency, such as wearing compression stockings or losing weight. Some patients may be good candidates for minimally
How Healthy Leg Veins Work, and What Goes Wrong in Chronic Venous Insufficiency
Blood returning from the feet has to travel uphill, against gravity, for four feet or more. Two systems make that possible. The first is the calf muscle pump: every time you take a step, the calf muscles squeeze the deep veins and push blood upward. The second is a series of thin, one-way valves inside the veins that close behind each push so blood cannot slide back down.
Chronic venous insufficiency develops when this system breaks down. Valves may stretch and stop meeting in the middle, often in the great saphenous vein that runs along the inner leg. A previous clot may scar the deep veins. Or the calf pump may weaken because of limited mobility or a stiff ankle. In each case, the pressure in the lower leg stays high even while walking. Doctors call this venous hypertension, and it is the root of nearly every symptom and complication of the condition.
One faulty valve tends to overload the one below it, which is why CVI is usually progressive. It rarely improves on its own, but its course can be slowed and its symptoms relieved with the right treatment.
Why symptoms build through the day
In the morning, after a night lying flat, the veins have drained and the legs usually feel fine. Once you are upright, gravity starts working against faulty valves, and every hour of standing or sitting adds a little more pooled blood and fluid. That is why patients so often tell us their legs feel heavy and tight by late afternoon, their shoes feel snug by evening, and everything is better again after a night’s sleep. That daily rhythm is one of the most reliable clues that the veins are responsible.
The Stages of Chronic Venous Insufficiency
Vein specialists use a standard system called CEAP to describe how advanced venous disease is. Knowing your stage helps explain what you are seeing on your legs and why treatment is recommended.
| Stage | What it looks like | What it means for you |
|---|---|---|
| C0 | No visible signs, but symptoms may be present | Aching or heaviness can occur before veins are visible |
| C1 | Spider veins or small reticular veins | Often cosmetic, sometimes a sign of deeper reflux |
| C2 | Varicose veins, usually 3 mm or larger | Common point at which symptoms lead people to seek care |
| C3 | Swelling (edema) of the ankle or leg | Pressure is now affecting the tissues |
| C4 | Skin changes: brown staining, eczema, hardened skin, white scar-like patches | The skin is under strain; treatment becomes more urgent |
| C5 | A healed venous ulcer | High risk of the ulcer returning without treatment |
| C6 | An open venous ulcer | Needs wound care plus treatment of the faulty veins |
People do not have to move through every stage, and some stay at C2 for many years. But once skin changes appear, the damage to the tissue tends to be slow to reverse, so we encourage patients to be evaluated before that point.
Skin Changes That Signal Advancing CVI
Beyond swelling and visible veins, the skin of the lower leg gives important clues about how much pressure it has been under:
- Hyperpigmentation: brown or rust-colored staining around the ankles from iron in red blood cells that leak into the tissue
- Venous eczema: itchy, red, scaly or weeping skin, often mistaken for a simple rash
- Lipodermatosclerosis: tight, hard, sometimes tender skin above the ankle, which can give the lower leg an inverted champagne-bottle shape
- Atrophie blanche: small, smooth, white scar-like patches that are fragile and prone to painful ulcers
- Corona phlebectatica: a fan of tiny blue and red veins around the ankle or inner foot
Scratching itchy skin and using harsh soaps can make these changes worse. A fragrance-free moisturizer and treating the underlying vein pressure are usually far more effective than creams alone.
How We Evaluate Chronic Venous Insufficiency
At Premier Vein & Vascular Center, diagnosis is built around a careful conversation and an ultrasound performed in our IAC-accredited vascular lab.
- Focused history. We ask about aching, heaviness, swelling, cramps, itching and restless legs, what makes them better or worse, and about pregnancies, clots, family history, your job and any previous vein treatment.
- Examination. We examine both legs standing and lying down, look for varicose veins, swelling and skin changes, and check foot pulses to make sure the arteries are healthy enough for compression and treatment.
- Venous duplex ultrasound. This painless scan shows blood flow in real time. With you standing or tilted, the sonographer tests each vein segment for reflux, measures vein size, and checks the deep veins for clot or old scarring. If foot pulses are weak, an ankle-brachial index is added.
- A clear plan. Dr. Raza reviews the images, tells you which veins are failing and what stage your disease is, and recommends a plan, from compression and lifestyle changes to a minimally invasive procedure.
A typical first visit with ultrasound takes about an hour to an hour and a half. Wear loose clothing or shorts and bring a list of your medicines.
Questions to ask about your ultrasound results
- Which veins are leaking, and in which leg?
- Are my deep veins healthy, and is there any sign of an old clot?
- What stage is my venous disease?
- Which treatment fits my veins best, and why?
- Will I need more than one procedure, and in what order?
A good vein team will answer these plainly and show you the findings, so you understand the reason behind every recommendation.
Chronic Venous Insufficiency Treatment Options Compared
Most modern CVI treatment is done in the office, under local anesthesia, with no hospital stay. The right procedure depends on which veins are leaking, their size and how straight or twisted they are. Many patients need a combination.
| Treatment | Best suited for | How it works | Typical recovery |
|---|---|---|---|
| Compression stockings | All stages; first step and ongoing support | Squeezes the leg to reduce pooling and swelling | None |
| Radiofrequency or laser ablation | Leaking saphenous trunk veins | Heat delivered through a thin catheter seals the vein | Walk the same day; normal routine in a day or two |
| Non-thermal ablation (adhesive or microfoam) | Trunk veins, especially where heat is less suitable | Medical adhesive or foam closes the vein without heat | Walk the same day; often no tumescent anesthesia |
| Ambulatory phlebectomy | Large bulging surface branches | Veins removed through tiny nicks in the skin | A few days of bruising and mild soreness |
| Ultrasound-guided foam sclerotherapy | Twisted branches and veins feeding skin changes or ulcers | Foam injected under ultrasound closes the vein | Usually back to normal activity the same day |
Closing a refluxing vein does not harm circulation. Blood simply reroutes into healthy veins, and the leg usually works more efficiently afterward. You can read more about endovenous thermal ablation, non-thermal vein ablation and ambulatory phlebectomy on our treatment pages.
What recovery feels like
After an ablation, most patients describe a pulling or bruised feeling along the inner thigh or calf for a week or two, similar to a pulled muscle. Walking is encouraged right away and helps recovery. A follow-up ultrasound, usually within a few days, confirms that the vein has closed and that the deep veins are clear. Improvement in heaviness and swelling is often noticed within a few weeks.
Living Well With Chronic Venous Insufficiency
Even after successful treatment, CVI is a lifelong tendency, and daily habits make a real difference to how your legs feel and how quickly new problems appear:
- Walk most days; even 20 to 30 minutes keeps the calf pump strong
- Do calf raises and ankle circles during long periods of sitting or standing
- Raise your legs above heart level in the evening when they feel heavy
- Wear compression on long flights, long shifts and hot days when swelling is worse
- Keep a healthy weight to lower pressure in the abdominal and leg veins
- Care for the skin of the lower leg with gentle cleansers and moisturizer, and treat small cuts promptly
- Have a follow-up check if swelling, skin changes or new veins appear
Call 911 or seek emergency care if you notice:
- Sudden swelling, pain and warmth in one leg, which may be a deep vein thrombosis
- Chest pain, sudden shortness of breath or coughing up blood
- Bleeding from a varicose vein that does not stop with firm pressure and leg elevation
- Spreading redness, fever or red streaks around a leg wound
Chronic Venous Insufficiency Care in Houston
If your legs ache and swell by the end of the day, or you are noticing skin discoloration around your ankles, it is worth finding out whether venous insufficiency is the cause. Dr. Syed Raza, a fellowship-trained interventional radiologist with more than 15 years of experience treating venous reflux, sees patients from across Houston and Katy. As a Houston vein specialist practice with more than 20 years of vein care, we usually offer same-week appointments and accept most insurance plans, including Medicare. Learn more on our venous insufficiency treatment page or call (832) 321-5355.
Talk With a Specialist at Premier Vein
Have questions about your symptoms or treatment options? Dr. Syed Raza and the team at Premier Vein & Vascular Center can evaluate your concerns and explain your options clearly. Same-week appointments are usually available, and most insurance plans are accepted.
Frequently Asked Questions
Is chronic venous insufficiency serious?
CVI is not usually life-threatening, but it tends to progress and can lead to skin damage, chronic swelling and leg ulcers if left untreated. Early evaluation and treatment help prevent these complications and relieve symptoms.
Can chronic venous insufficiency be cured?
Damaged valves do not repair themselves, but the faulty veins can be closed with minimally invasive procedures, which relieves pressure and symptoms for most patients. Because CVI is a lifelong tendency, new veins can develop over time and may need follow-up care.
What is the best treatment for chronic venous insufficiency?
The best treatment depends on which veins are leaking, as shown on a duplex ultrasound. Many patients do well with compression plus endovenous ablation of the faulty trunk vein, with phlebectomy or sclerotherapy for remaining branches.
Does walking help venous insufficiency?
Yes. Walking activates the calf muscle pump, which pushes blood up the leg and lowers pressure in the veins. Regular walking, calf exercises and avoiding long periods of standing still all help symptoms.
Is venous insufficiency treatment covered by insurance?
Most insurance plans, including Medicare, cover evaluation and treatment of symptomatic venous insufficiency when ultrasound confirms reflux and the treatment is medically necessary. Some plans require a period of compression first.
What happens if venous insufficiency is not treated?
Untreated CVI often worsens slowly, with more swelling, larger varicose veins, skin discoloration, hardened skin and eventually venous ulcers in some people. Treating the faulty veins earlier usually makes these changes less likely.
Can young people have chronic venous insufficiency?
Yes. Although CVI becomes more common with age, it can start in the twenties or thirties, especially with a strong family history, pregnancy or a job that involves long hours on your feet. Symptoms at any age deserve an ultrasound.
Trusted Health Resources
- Chronic Venous Insufficiency, Society for Vascular Surgery
- Venous Insufficiency, MedlinePlus Medical Encyclopedia (NIH)
- Varicose Veins and Spider Veins, MedlinePlus (NIH)