What it is
A venous stasis ulcer is an open sore, most often on the lower leg or near the ankle, that develops when circulation in the leg veins is not working as it should. It is also called a venous leg ulcer or venous insufficiency ulcer.
The central cause is chronic venous insufficiency. Leg veins have small one-way valves that help blood travel upward against gravity. When those valves weaken or become damaged, blood can pool in the lower leg. Pressure inside the veins rises (venous hypertension), and over time the skin and tissue can become fragile, swollen, discolored or irritated, and a small injury may fail to heal.
Factors that are commonly associated with weakened veins include a past blood clot in the leg (deep vein thrombosis), varicose veins, long periods of standing or sitting, excess body weight, a family history of vein problems, previous leg injury or surgery, pregnancy, and reduced calf-muscle movement. Not everyone with these factors develops an ulcer, and a clinician is needed to determine what is behind any particular wound.
How it’s traditionally been approached
Venous ulcers have long been evaluated by looking at the whole leg and not only the open area. Clinicians commonly review medical history, examine the skin, check pulses and circulation, and may use non-invasive tests such as ultrasound to look at how blood is moving through the veins.
Traditional care has often centered on managing the wound surface with dressings, keeping the area clean, and addressing swelling with compression, which is commonly used when a clinician has confirmed it is appropriate. Because leg ulcers can also come from artery problems, diabetes or other causes, checking circulation first is a standard part of the process.
Approaches to the underlying vein problem have also been discussed with vascular or vein specialists, and care often involves attention to skin health, mobility and ongoing follow-up. Which options are suitable depends entirely on the individual evaluation by a licensed provider.
How the right wound care specialist may help
A wound care specialist, sometimes working with a vascular or vein specialist, may help sort out why a leg wound is not healing. A visit generally includes a review of your health history, a close look at the wound and surrounding skin, and an assessment of circulation in both the veins and arteries.
Many people find it helpful to bring a list of current medications, past leg problems such as blood clots or surgeries, and notes on when the wound started and how it has changed. A specialist may explain what they think is contributing to the wound and what the next steps in evaluation could be.
Good questions to ask a licensed provider include: What is causing my wound? How is it staged or classified? What treatment options exist for me, and what are their pros and cons? How long might healing take? What does my insurance cover? What signs should prompt me to call you sooner?
The whole-person view
Body, mind and stress influence one another. Living with a long-lasting wound can bring discomfort, disrupted sleep, worry about mobility and frustration with frequent appointments, and stress can in turn affect sleep, activity levels and daily habits that matter for overall wellbeing.
Some people explore body-based support such as Somatic Experiences to build awareness of how stress is held in the body, and others find talk therapy through Therapists.plus helpful for coping with the emotional load of a chronic condition. These can complement, never replace, the care guided by your wound care team.
Somatic Experiences: trauma and emotional healing →Somatic Experiences: embodiment and movement →Therapists.plus: mind body connection →
Keep in mind
- Any sign of infection, such as spreading redness, red streaking, increasing warmth or pain, pus, foul odor, fever or chills, or a wound that is rapidly worsening, means you should seek medical care promptly.
- For heavy bleeding, exposed bone or tendon, signs of sepsis, or a deep or severely contaminated wound, call 911 or go to the nearest emergency room.
- Leg ulcers can have different causes, including artery disease and diabetes, so licensed professionals should evaluate and guide care rather than self-diagnosis.
- If emotional distress ever feels overwhelming, call or text the 988 Lifeline at any time.
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Frequently asked questions
What are the main venous stasis ulcer causes?
The main cause is chronic venous insufficiency, where weakened vein valves let blood pool in the lower legs and raise pressure in the veins. Over time this can damage the skin and make wounds slow to heal. A licensed provider can determine what is contributing in your case.
Can a blood clot lead to a venous stasis ulcer?
A past deep vein thrombosis is commonly associated with later vein damage, which may contribute to a venous ulcer in some people. Not everyone who has had a clot develops one. A clinician can assess your vein health and history.
Why do venous stasis ulcers usually appear near the ankle?
Pressure from pooled blood tends to be highest in the lowest part of the leg because of gravity. The skin around the ankle can become fragile and discolored, so even a minor injury may turn into a sore that struggles to close. A provider can examine the area and explain what they see.
Is a venous stasis ulcer the same as an arterial ulcer?
No. Venous ulcers relate to vein function and pooling blood, while arterial ulcers relate to reduced blood flow through the arteries. They can look and feel different, and care considerations differ, so a professional evaluation of circulation is important.
Can a wound care specialist help with venous stasis ulcers?
A wound care specialist may help by evaluating the wound, looking at possible causes, and discussing care options with you, sometimes alongside a vascular specialist. Outcomes vary from person to person and are never guaranteed. Ask about your wound's cause, staging, treatment options, expected healing time and insurance coverage.
When should I see a doctor about a leg sore?
Seek medical care promptly if a leg sore shows spreading redness, red streaking, increasing warmth or pain, pus, foul odor, fever or chills, or is getting worse quickly. Even without these signs, a sore that is not healing is worth having evaluated. For heavy bleeding or other emergencies, call 911.
Educational resource. WoundKare shares general information and connects people with independent wound care specialists. It is not medical advice, diagnosis or treatment. Talk with a licensed professional about your health.