Most leg ulcers are caused by poor blood flow in the veins, and the cornerstone of treatment is compression therapy combined with proper wound care. About three-quarters of leg ulcers heal within six months with consistent treatment, though some take longer depending on size, cause, and how well the underlying circulation problem is managed. Getting the right diagnosis first is critical, because treatment that helps one type of ulcer can actually harm another.
Why the Type of Ulcer Matters
Leg ulcers fall into two main categories: venous and arterial. Venous ulcers, which account for the majority of cases, develop when valves in the leg veins stop working properly and blood pools in the lower legs. These typically appear on the inner ankle, produce moderate to heavy drainage, and are surrounded by discolored, thickened skin. Arterial ulcers happen when narrowed arteries can’t deliver enough blood to the tissues. They tend to form on the toes, feet, or outer ankle, and the surrounding skin often looks pale or shiny.
The distinction matters because compression, the single most effective treatment for venous ulcers, can be dangerous for arterial ulcers. Squeezing a leg that already has poor arterial flow can cut off remaining blood supply and cause tissue damage. A simple, painless test called the ankle-brachial index (ABI) compares blood pressure at the ankle to blood pressure in the arm. Current guidelines restrict compression in patients with significant arterial disease, defined as an ABI between 0.5 and 0.8. Below 0.5, compression is generally avoided entirely. Your provider should perform this test before starting any compression regimen.
Compression Therapy for Venous Ulcers
Compression is the single most important intervention for venous leg ulcers. It works by counteracting the pooling of blood, pushing fluid back toward the heart and reducing the swelling that prevents healing. Research consistently shows that sub-bandage pressure in the range of 35 to 45 mmHg produces the best healing outcomes. This is typically achieved with multilayer bandage systems or graduated compression stockings that apply the highest pressure at the ankle (around 30 to 40 mmHg) and gradually decrease up the calf.
Compression isn’t a one-time fix. You’ll wear the bandages or stockings consistently, often for weeks or months, with regular changes by a nurse or wound care specialist. Many people find compression uncomfortable at first, especially if the leg is swollen. The pressure should feel firm but not painful. If you experience increased pain, numbness, or tingling, the bandage may be too tight or compression may not be appropriate for your situation.
Even after an ulcer heals, wearing compression stockings long-term helps prevent recurrence. Without ongoing compression, the underlying vein problem remains, and ulcers frequently come back.
Cleaning and Preparing the Wound Bed
Before a wound can heal, dead or damaged tissue needs to be removed. This process, called debridement, comes in several forms depending on how much tissue needs clearing and how quickly.
- Sharp debridement uses a scalpel or special scissors to cut away dead tissue. It’s the fastest method and gives the clearest view of the wound, but it’s performed by a trained clinician.
- Autolytic debridement uses your body’s own enzymes to soften and break down dead tissue. Moisture-retaining dressings like hydrocolloids or hydrogels create the right environment for this to happen naturally. It’s slower but selective, meaning it only breaks down dead tissue.
- Enzymatic debridement applies chemical enzymes to the wound surface to dissolve dead tissue. These are prescription ointments applied at dressing changes.
- Mechanical debridement uses water irrigation to wash away debris. In some cases, medical-grade maggots are introduced to eat only dead skin while releasing chemicals that promote healing.
Most people with leg ulcers experience autolytic debridement through their regular dressings, with occasional sharp debridement performed during clinic visits when needed.
Choosing the Right Wound Dressing
The goal of any dressing is to keep the wound moist enough to heal without becoming waterlogged. The right choice depends mainly on how much fluid the ulcer produces.
For wounds with heavy drainage, alginate dressings (derived from seaweed) absorb fluid and form a gel that maintains moisture balance while allowing air exchange. Foam dressings also handle heavy exudate well, absorbing fluid into the foam layer while keeping the wound surface moist. For wounds with moderate drainage, hydrocolloid dressings absorb fluid and create a sealed, moist environment that blocks bacteria and liquid from getting in. For dry or minimally draining wounds, hydrogel sheets can actually add moisture back, rehydrating the wound bed to support healing.
Dressings are typically changed every few days, though the schedule varies based on how much fluid the wound produces. Your wound care provider will adjust the dressing type as the ulcer progresses through different healing stages.
Recognizing Infection Early
Leg ulcers are vulnerable to infection, and catching it early prevents serious complications. Signs to watch for include worsening pain around the ulcer, a green or foul-smelling discharge, redness and swelling spreading outward from the wound edges, and fever. On darker skin tones, redness may be harder to see, so pay particular attention to increased warmth, swelling, and changes in pain or discharge.
If you notice these signs, contact your wound care provider promptly. Infected ulcers typically need antibiotics and more frequent dressing changes. Delaying treatment can allow infection to spread into deeper tissue or the bloodstream.
Leg Elevation and Daily Habits
Elevating your legs above heart level helps venous blood return to the heart and reduces the swelling that slows healing. The most effective position is lying flat on a bed with your legs propped on pillows, rather than sitting in a recliner. Aim for at least 60 minutes of elevation spread across two to four sessions per day. Afternoon sessions seem particularly beneficial.
Beyond elevation, staying active matters. Walking activates the calf muscle pump, which pushes blood upward through the veins. Avoid standing or sitting still for long periods. If your work requires standing, take regular breaks to walk or elevate. Keep the skin around the ulcer moisturized to prevent cracking, but avoid applying creams directly into the wound unless instructed.
When Procedures May Help
For ulcers that don’t respond to compression and wound care, or that keep coming back, treating the underlying vein problem can make a significant difference. Procedures like endovenous laser or radiofrequency ablation seal off the faulty veins causing blood to pool. These are minimally invasive, typically performed in an outpatient setting with local anesthesia.
After vein procedures, about 57% of ulcers heal within three months, 74% within six months, and 78% within a year. However, recurrence remains a concern: roughly 9% of ulcers return within one year, 20% within two years, and 29% within three years. This is why continued compression and self-care remain important even after a procedure. The vein treatment addresses one part of the problem, but the tendency toward venous insufficiency persists.
What Realistic Healing Looks Like
Leg ulcers are slow wounds. Even with optimal treatment, expect weeks to months of healing rather than days. Small ulcers may close within a few weeks under compression, while larger or older ulcers can take six months or longer. If an ulcer hasn’t shown measurable improvement in size after four to six weeks of consistent treatment, your provider will likely reassess the approach, checking for undiagnosed arterial disease, infection, or other factors stalling progress.
Healing is rarely linear. You may see steady improvement for weeks, then a plateau. Setbacks from minor bumps, skin irritation, or brief lapses in compression are common. The most important factor in healing is consistency: keeping compression on, attending regular dressing changes, elevating daily, and staying mobile. People who stick with the full regimen heal significantly faster than those who use compression or wound care intermittently.