Venous Leg Ulcer

What is venous leg ulcer?

A venous leg ulcer is an open sore on the lower leg, most often near the ankle, that develops because the veins in the leg are not moving blood back toward the heart as well as they should. When people ask “what is venous leg ulcer,” the simplest answer is that it is a slow-healing wound caused by long-standing problems with blood flow in the leg veins, a condition doctors call chronic venous insufficiency. In medical coding systems, this condition is listed under ICD-10 code I83.009.

Veins carry blood from the legs back up to the heart, working against gravity. Small one-way valves inside the veins keep the blood moving in the right direction. If these valves become weak or damaged, blood can pool in the lower legs. Over time, this pooling raises the pressure inside the veins, which damages the skin and the tissue underneath it. Eventually, the skin can break down and form an ulcer — an open wound that does not heal in the usual way.

Venous leg ulcers are the most common type of chronic (long-lasting) leg wound. They can affect adults of any age but are more common in older people, in women, and in people who have had vein problems such as varicose veins (enlarged, twisted veins visible under the skin) or a previous blood clot in a deep leg vein. Without proper care these ulcers can persist for months or return after healing, which is why understanding the condition and its treatment matters.

Symptoms of venous leg ulcer

Venous leg ulcer symptoms usually develop gradually. In many cases, the skin changes for weeks or months before an open wound appears. Recognizing the early signs can help you seek care before the skin breaks down.

Common venous leg ulcer symptoms include:

• An open sore on the lower leg, most often on the inner side of the leg just above the ankle. The wound is usually shallow with irregular edges and may weep fluid.
• Swelling of the lower leg and ankle, which is often worse at the end of the day and improves after lying down or raising the leg.
• Aching, heaviness, or a feeling of tightness in the leg, especially after standing for long periods.
• Skin discoloration, often a brownish or reddish staining of the skin around the ankle. This happens when blood pigments leak out of the overstretched veins into the skin.
• Itchy, dry, or flaky skin around the lower leg, sometimes called venous eczema or stasis dermatitis (skin inflammation caused by poor blood flow).
• Hardening or thickening of the skin around the ankle, which doctors call lipodermatosclerosis.
• Fluid drainage from the wound, which can range from clear to yellowish. A sudden increase in drainage, a bad smell, or pus may be a sign of infection.

Symptoms can differ depending on the stage of the underlying vein disease. In the earliest stages, a person may only notice varicose veins, mild swelling, or tired legs. As venous insufficiency progresses, skin discoloration, itching, and hardening appear. An ulcer is considered the most advanced stage of chronic venous disease. Even after an ulcer heals, the skin often remains fragile and discolored, and new ulcers can form if the underlying vein problem is not addressed.

Pain varies from person to person. Some venous leg ulcers cause only mild discomfort, while others are quite painful, particularly if the surrounding skin is inflamed or infected. Pain that gets suddenly worse, or a wound that becomes hot, red, and swollen, should always be evaluated promptly, as these can be signs of infection.

Causes and risk factors

The main venous leg ulcer causes trace back to sustained high pressure inside the leg veins, known medically as venous hypertension. This pressure develops when the one-way valves inside the veins fail, allowing blood to flow backward and pool in the lower leg. Over time, the raised pressure damages tiny blood vessels in the skin, reduces the delivery of oxygen and nutrients to the tissue, and makes the skin fragile. A minor bump or scratch can then break the skin, and because the tissue is poorly nourished, the wound struggles to heal.

Several conditions and circumstances can lead to this valve failure or make an ulcer more likely:

• Chronic venous insufficiency — the long-term failure of the leg veins to return blood efficiently. This is the underlying problem in most venous leg ulcers.
• Varicose veins — enlarged surface veins that often signal valve problems in the venous system.
• Previous deep vein thrombosis (DVT) — a blood clot in a deep leg vein can permanently damage the valves, a condition sometimes called post-thrombotic syndrome.
• Older age — vein walls and valves weaken naturally over time.
• Obesity or excess body weight — extra weight increases the pressure in the leg veins.
• Prolonged standing or sitting — occupations or lifestyles that keep the legs still for long periods reduce the pumping action of the calf muscles, which normally helps push blood upward.
• Previous leg injury or surgery — trauma, fractures, or operations on the leg can damage veins or reduce mobility.
• Limited mobility — conditions that make walking difficult weaken the calf muscle pump.
• Pregnancy — multiple pregnancies can increase pressure on the leg veins and contribute to valve damage over time.
• Family history — vein problems often run in families.
• A previous venous leg ulcer — people who have had one ulcer are at higher risk of developing another.

It is worth noting that not all leg ulcers are venous. Some are caused by poor arterial blood supply (arterial ulcers), diabetes, pressure, or other conditions, and each type needs different treatment. This is one reason proper diagnosis is essential before starting therapy.

Diagnosis

Venous leg ulcer diagnosis begins with a careful history and physical examination. Your doctor will ask about how the wound started, how long it has been present, previous vein problems, blood clots, leg injuries, and other health conditions such as diabetes. During the examination, the doctor looks at the location and appearance of the ulcer and the surrounding skin. A shallow wound near the inner ankle, together with swelling, brown skin discoloration, and varicose veins, strongly suggests a venous cause.

To confirm the diagnosis and rule out other causes, doctors commonly use the following tests:

• Duplex ultrasound — a painless scan that uses sound waves to show how blood flows through the leg veins. It can identify valves that leak (a problem called reflux), veins that are blocked, and evidence of an old blood clot. This is the standard imaging test for suspected venous disease.
• Ankle-brachial index (ABI) — a simple test that compares blood pressure at the ankle with blood pressure in the arm. It checks whether the arteries supplying the leg are healthy. This test is important because compression therapy, the main treatment for venous ulcers, may not be safe if the arteries are significantly narrowed.
• Wound assessment and measurement — the size, depth, and appearance of the ulcer are documented so healing can be tracked over time.
• Blood tests — your doctor may check for diabetes, anemia, signs of infection, or nutritional problems that could slow healing.
• Wound swab or culture — if infection is suspected, a sample from the wound may be tested to identify bacteria and guide antibiotic choice.
• Biopsy — if an ulcer does not respond to appropriate treatment over several months, or looks unusual, a small tissue sample may be taken to rule out other conditions, including skin cancer, which can occasionally resemble a chronic ulcer.

Doctors may also classify the severity of the underlying vein disease using standardized systems, which helps guide treatment planning and allows progress to be compared over time.

Treatment options

Venous leg ulcer treatment has two main goals: healing the current wound and correcting, as far as possible, the underlying vein problem so the ulcer does not come back. Treatment usually combines several approaches, and simple watchful waiting is generally not recommended, because untreated venous ulcers tend to persist or enlarge rather than heal on their own.

Compression therapy

Compression is the cornerstone of venous leg ulcer treatment. Specially designed bandages or stockings apply graduated pressure to the leg — strongest at the ankle and gradually less toward the knee. This pressure helps the veins push blood back toward the heart, reduces swelling, and creates conditions in which the wound can heal. Compression is typically applied by trained health professionals and adjusted as the leg changes shape with reduced swelling. It is important that arterial disease is ruled out first, since strong compression can be harmful if the arteries are narrowed. After the ulcer heals, many people are advised to continue wearing compression stockings long-term to lower the risk of recurrence.

Wound care

The ulcer itself needs regular cleaning and dressing. Dressings keep the wound moist, absorb drainage, and protect the surrounding skin. Debridement — the removal of dead or unhealthy tissue from the wound — may be performed to help healing. No single dressing type has been proven clearly superior for all wounds; your care team will choose based on the amount of drainage, the wound’s condition, and your comfort.

Medication

Antibiotics are used only when there are clear signs of infection, such as spreading redness, warmth, increasing pain, pus, or fever; they do not speed healing of uninfected ulcers. Your doctor may also consider certain medications, such as pentoxifylline (a drug that may improve blood flow in small vessels), as an addition to compression therapy in some cases. Pain relief, treatment of skin inflammation with topical steroid creams, and moisturizers for dry surrounding skin are often part of care as well.

Procedures and surgery

Treating the faulty veins themselves can help ulcers heal and reduce the chance that they return. Options depend on which veins are affected and may include:

• Endovenous ablation — a minimally invasive procedure in which a thin tube is inserted into the diseased vein and heat (from laser or radiofrequency energy) is used to close it. Blood then reroutes through healthy veins.
• Sclerotherapy — injection of a solution or foam that seals off faulty veins.
• Surgical vein removal or ligation — traditional operations that remove or tie off damaged surface veins in selected patients.
• Skin grafting — for large or very slow-healing ulcers, a thin layer of the patient’s own skin may be transplanted onto the wound to encourage closure.

Vein assessment and procedures of this kind are typically managed by vascular specialists; at Acibadem, conditions involving the veins and circulation are evaluated within the Cardiovascular Surgery department, often working together with wound-care and dermatology teams.

Lifestyle measures

Alongside medical treatment, doctors usually recommend elevating the legs above heart level for periods during the day, walking regularly to activate the calf muscle pump, avoiding long periods of standing or sitting still, maintaining a healthy weight, and caring for the skin to prevent dryness and injury.

Living with venous leg ulcer and outlook

With consistent, appropriate treatment — especially regular compression therapy — many venous leg ulcers heal over a period of weeks to months. Healing time varies widely and depends on the size and age of the ulcer, the severity of the underlying vein disease, other health conditions such as diabetes, mobility, and how consistently treatment is followed. Larger ulcers and those that have been present for a long time generally take longer to heal, and some prove stubborn despite good care.

Recurrence is a real concern. Because the underlying vein problem often remains after the wound closes, new ulcers can develop, particularly if compression stockings are stopped. Long-term habits make a meaningful difference: wearing prescribed compression stockings daily, elevating the legs when resting, staying active, protecting the skin from injury, moisturizing dry skin, and attending follow-up appointments. Treating the faulty veins with a procedure, where appropriate, may further reduce the risk of the ulcer returning.

Living with a chronic wound can affect sleep, mobility, work, and mood. It is reasonable to discuss pain control, dressing schedules that fit your daily life, and any feelings of frustration or low mood with your care team. Support from family members or caregivers with dressing changes and stocking application can also help, since compression stockings can be difficult to put on, and application aids are available.

Frequently asked questions

What is a venous leg ulcer in simple terms?

A venous leg ulcer is an open sore on the lower leg, usually near the ankle, caused by long-term problems with blood flow in the leg veins. When the valves inside the veins fail, blood pools in the lower leg, pressure builds, and the skin becomes damaged and eventually breaks down into a wound that heals slowly without treatment.

Can a venous leg ulcer heal on its own?

Venous leg ulcers rarely heal well without treatment, because the underlying pressure problem in the veins remains. With proper care — most importantly compression therapy along with wound dressings — many ulcers do heal over weeks to months. Delaying treatment tends to make healing slower and increases the risk of infection, so early evaluation is generally advised.

How serious is a venous leg ulcer?

A venous leg ulcer is usually not immediately life-threatening, but it is a serious condition that deserves proper medical care. Untreated ulcers can enlarge, become infected, cause significant pain, and greatly affect quality of life. In rare cases, long-standing infection can spread to deeper tissue. Prompt diagnosis and treatment reduce these risks in most cases.

What does a venous leg ulcer look like?

It typically appears as a shallow, open wound with irregular edges on the inner side of the lower leg near the ankle. The wound base may look red or yellowish and often weeps fluid. The surrounding skin is frequently swollen, discolored brown or reddish, dry, itchy, or hardened. Only a health professional can confirm the type of ulcer, since other wounds can look similar.

How long does a venous leg ulcer take to heal?

Healing time varies widely. Many ulcers improve within a few months of consistent compression therapy and wound care, but larger or long-standing ulcers, or those in people with other health conditions, can take considerably longer. Some ulcers do not heal with standard care and may need additional treatments such as vein procedures or skin grafting. Your doctor can give guidance based on your specific situation.

What is the best treatment for a venous leg ulcer?

Compression therapy is the foundation of venous leg ulcer treatment, combined with regular wound cleaning and dressings. Antibiotics are used only if the wound is infected. Procedures that close faulty veins, such as endovenous ablation or sclerotherapy, may help healing and reduce recurrence in suitable patients. The best combination depends on your vein anatomy, arterial health, and overall condition, which is why individual assessment matters.

Will my venous leg ulcer come back after it heals?

Recurrence is common because the underlying vein disease usually persists after the skin heals. Wearing compression stockings long-term, elevating the legs, staying active, and maintaining a healthy weight all help lower the risk. In some patients, treating the diseased veins with a procedure further reduces the likelihood of a new ulcer, though no approach can guarantee it will never return.

When to see a doctor

Any open sore on the leg that has not started to heal within about two weeks should be evaluated by a health professional, as should persistent leg swelling, skin discoloration, or hardening around the ankle. Early treatment usually means faster healing and fewer complications.

Seek medical attention urgently if you notice any of the following red-flag warning signs:

• Signs of infection — spreading redness or warmth around the wound, increasing pain, pus, a foul smell, or a sudden increase in drainage.
• Fever or chills, which may indicate that an infection is spreading beyond the wound.
• Rapidly worsening pain in the leg or wound.
• Sudden swelling of one leg, especially with calf tenderness, which can be a sign of a blood clot in a deep vein.
• Bleeding from the ulcer or from a varicose vein that does not stop with firm pressure.
• Black or dying tissue in or around the wound.
• A cold, pale, or numb foot, which may signal a problem with the arterial blood supply and needs prompt assessment.

If you have diabetes, poor circulation, or a weakened immune system, it is especially important to have any leg wound checked early, because complications can develop more quickly. A doctor can confirm whether the wound is a venous leg ulcer, rule out other causes, and start treatment that gives the wound the best chance to heal.