What leg ulcers look like includes a persistent open wound on the lower leg, ankle, or foot, often with drainage, swelling, redness, or damaged skin. Tissue may appear red, yellow, brown, or black, and the sore may enlarge or develop odor. A wound that does not close like a minor cut needs prompt assessment.
This guide helps you compare venous, arterial, and neuropathic wounds, recognize infection signs, and document changes for a healthcare professional who can assess circulation, sensation, and skin.
Typical Appearance and Location of Leg Ulcers
Leg ulcers usually develop on the lower legs and feet, where gravity, swelling, pressure, and reduced circulation can place extra stress on the skin. A wound near the inner ankle is more consistent with a venous pattern, while a sore on a toe or sole may involve pressure, diabetes, or reduced sensation.
Location provides a clue, but it cannot establish the cause by itself. An arterial wound can occur on the foot, and a venous wound may extend above the ankle, so a clinician considers location alongside appearance, circulation, and sensation.
Where ulcers usually develop
The ankle, lower leg, foot, toes, and sole are common sites because they bear weight or contain skin affected by swelling and impaired blood flow. Fluid that collects during the day increases pressure around the ankle and can make nearby skin fragile.
A wound behind the ankle or near the inner ankle may point to venous insufficiency. A sore on a toe, ball of the foot, or sole can suggest neuropathic injury from diabetes or reduced sensation.
Features you may notice
The center may contain moist wound tissue, yellow material, dark tissue, or a combination of colors. Surrounding skin can look red, swollen, scaly, discolored, warm, or tender, while the edges may be irregular, raised, inflamed, or sharply defined.
| Feature | What you may see |
|---|---|
| Wound center | Open skin, moist drainage, red tissue, yellow material, or dark tissue |
| Surrounding skin | Redness, swelling, scaling, warmth, or brown discoloration |
| Wound drainage | Clear, cloudy, yellow, blood-tinged, thicker, or pus-like fluid |
| Wound edge | Irregular, inflamed, raised, sharply outlined, or thickened |
These features differ from a small cut or bruise because an ulcer often remains open and enlarges over time. Venous eczema and stasis dermatitis can also produce red, itchy, scaly skin, but appearance alone cannot confirm either condition.
Venous Ulcers and Changes in the Surrounding Skin
Brown skin discoloration, swelling, and an ankle wound form a common venous pattern because impaired veins allow fluid to collect in the lower leg. The wound is often shallow, irregular, and moist, with skin changes extending beyond its edge.
The venous pattern
Venous leg ulcers commonly sit near the ankle, including the area just above the shoe line. They may leak clear or cloudy fluid, leaving damp patches on clothing or dressings, while nearby skin can be red, swollen, scaly, or itchy.
Venous insufficiency means the veins have difficulty returning blood to the heart. Fluid can collect in the lower leg, creating heaviness, swelling, and pressure, and your leg may feel worse after standing for a prolonged period.
Skin changes around the ankle
Brown discoloration can develop as pigment settles in the affected skin. Stasis dermatitis, also called venous eczema, can make the area itchy, red, and scaly, and an accompanying open sore needs medical assessment.
| Venous clue | Possible appearance or symptom |
|---|---|
| Location | Lower leg, ankle, or area just above the shoe line |
| Wound bed | Shallow, irregular, moist, and sometimes leaking fluid |
| Nearby skin | Redness, scaling, swelling, itching, or brown patches |
| Leg sensation | Heaviness, aching, or swelling that builds during the day |
Red granulation tissue may look moist and bumpy inside the wound, while yellow slough can form a soft or sticky layer. Dark brown or black tissue may indicate tissue death, but wound color can overlap and cannot identify the cause alone.
Arterial and Neuropathic Ulcer Patterns
A dry, sharply outlined wound with pale, shiny, cool, thin, or hairless skin suggests an arterial pattern. A painless sore beneath a toe or on a weight-bearing area of the sole can instead indicate pressure injury caused by reduced sensation.
Arterial ulcers
Peripheral arterial disease reduces circulation to the leg, leaving tissue with less oxygen and fewer nutrients. This damage helps explain why arterial leg ulcers can look dry, dark, sharply outlined, or “punched out,” with pale or cool skin nearby.
You may notice cold feet, color changes, or a foot that takes longer than usual to return to its normal color after pressure. Reduced blood flow can slow recovery and increase concern about infection or tissue death.
Neuropathic ulcers
Neuropathic ulcers develop where repeated pressure or reduced sensation allows injury to remain unnoticed. They commonly occur beneath a toe, on the ball of the foot, or on another weight-bearing area, where a blister or callus may break down into a persistent sore.
| Feature | Arterial pattern | Neuropathic pattern |
|---|---|---|
| Usual location | Toes, foot, or lower leg with poor circulation | |
| Wound appearance | Dry, dark, sharply outlined, or punched out | |
| Nearby skin | Pale, shiny, cool, thin, or hairless | |
| Pain | May be present or absent | |
| Pressure pattern | May follow reduced circulation or unnoticed injury |
Diabetes can contribute to both peripheral arterial disease and loss of protective sensation. A small blister or callus may become a diabetic foot ulcer after repeated pressure, so you should inspect your feet and legs even when the wound feels quiet.
Because pressure injury can progress quietly, drainage, tissue changes, and infection signs require careful attention alongside the ulcer’s pattern.
Wound Tissue, Drainage, and Infection Warning Signs
Red, yellow, brown, or black tissue can occur inside or around an open wound, but color alone cannot show whether infection is present. A sudden change in drainage, odor, redness, swelling, warmth, or pain needs assessment because several conditions can produce the same colors.
What the wound bed may contain
Red granulation tissue looks moist and bumpy, while yellow slough may form a soft or sticky covering. Black or brown eschar is dead tissue that can look dry and firmly attached, and the entire wound must be assessed before any single feature is interpreted.
Wound drainage, also called exudate, may be clear, cloudy, yellow, or blood-tinged. A small amount can occur with some wounds, but a sudden increase, thicker fluid, or new odor changes the situation and should be documented before your appointment.
Signs that may suggest infection
An infected wound can worsen over hours or days. Spreading redness, a warmer border, swelling, pus, odor, increasing pain, new dark tissue, or a rapid rise in drainage can indicate a local infection, and fever may occur but is not required.
- Spreading redness: Redness moves beyond the original wound border.
- Border warmth: The skin around the sore feels noticeably warmer than nearby skin.
- Drainage changes: Fluid becomes thicker, cloudy, yellow, or pus-like.
- New odor: An unpleasant smell begins near the wound.
- Pain change: Discomfort increases or changes in character.
- Skin change: Swelling, black tissue, or a spreading dark area appears.
Reduced sensation can hide pain, so appearance matters more than how the wound feels. Do not wait for severe pain before seeking care for spreading redness, pus, odor, or a sudden change in the wound.
Tracking these changes over time helps distinguish an expected healing process from deterioration that should prompt medical evaluation.
How to Identify a Leg Ulcer and Track Changes
A persistent open sore on the ankle, lower leg, or foot is more consistent with an ulcer than with a minor cut. You can identify a possible leg ulcer by recording its duration, size, drainage, wound tissue, nearby skin changes, and relation to pressure or swelling.
Changes that need prompt attention
Any wound that expands, drains heavily, changes color, or develops new skin changes should be assessed. Worsening swelling, a new odor, or a change in pain deserves the same attention because these signs may reflect worsening blood flow, infection, pressure, or another problem.
Seek prompt medical attention for a suspicious open wound that is enlarging, draining pus, developing odor, or showing spreading redness.
Venous, arterial, and neuropathic patterns can overlap, and skin color varies with your natural skin tone, lighting, drainage, and the position of your leg. Appearance can guide your questions, but it cannot safely establish the diagnosis.
What a clinician may examine
A clinician may examine the wound, ask about circulation and sensation, and check the pulses in your feet. Blood tests can help assess inflammation or glucose-related concerns, while circulation tests may show whether blood flow is adequate.
A wound swab or biopsy may be used in selected cases because drainage and appearance do not reveal every cause. Understanding the source matters because a dressing cannot correct poor circulation, pressure, swelling, or another underlying problem.
That approach aligns with public wound-care guidance from the Centers for Disease Control and Prevention and the National Institute for Health and Care Excellence, which emphasize infection prevention and assessment of underlying causes.
A practical documentation checklist
Record the wound before leaving home or traveling to a clinic. Clear notes can show how quickly it changed and provide specific details about drainage, discoloration, pain, and the surrounding skin.
- Wound location: Document whether the ankle, lower leg, foot, toe, or sole is involved.
- Size change: Record whether the opening is wider, longer, or deeper.
- Tissue color: Describe red, yellow, brown, black, or mixed wound tissue.
- Drainage details: Document the amount, color, thickness, and odor of fluid.
- Nearby skin: Describe redness, swelling, warmth, scaling, or discoloration.
- New symptoms: Record pain, fever, numbness, or changes in walking.
When You Should See a Doctor About a Leg Ulcer
See a doctor about an open wound that persists, enlarges, drains heavily, changes color, develops odor, or shows spreading redness. Sudden swelling, warmth, pus, black tissue, fever, or an abrupt change in drainage also needs prompt evaluation.
Do not use appearance alone to judge seriousness, especially if you have diabetes, peripheral arterial disease, reduced sensation, or venous insufficiency. These conditions can change how quickly a wound progresses and how little pain you may feel.
What to do about a suspected ulcer
Stop using the affected area for unnecessary pressure, avoid self-applying compression without professional advice, and arrange a medical assessment. Clean the area gently according to existing instructions and avoid putting unprescribed ointments or dressings into an open wound.
Describe the wound’s duration, size, drainage, color, odor, and surrounding skin changes. Reduced sensation makes regular foot checks especially important because pain may not alert you to pressure injury or infection.
Why early assessment expands your options
Early evaluation can identify whether venous insufficiency, poor circulation, pressure, or sensory loss is driving the wound. Circulation tests, glucose-related assessment, and a wound examination can then guide care before infection or tissue death develops.
You should not diagnose a venous ulcer from ankle location alone or an arterial ulcer from a dark wound bed alone. A clinician can separate venous insufficiency from peripheral arterial disease and determine whether safe compression is appropriate.
That diagnostic distinction shapes treatment, because compression may help venous disease while being unsafe when arterial circulation is impaired.
Treatment Choices Depend on the Ulcer’s Underlying Cause
Care must match the condition causing the wound, because dressings alone cannot correct poor circulation, repeated pressure, swelling, or sensory loss. Venous ulcers may require circulation and swelling management, arterial ulcers need blood-flow attention, and neuropathic ulcers require pressure relief.
Matching care to the cause
Venous ulcers often need attention to circulation, swelling, moisture, dressings, and an individualized compression plan. You should not apply compression blindly to a wound with suspected poor circulation because inadequate arterial blood flow can require a different approach.
Arterial ulcers call for attention to blood flow and foot protection. Neuropathic ulcers commonly need pressure relief, assessment of sensation and circulation, careful footwear, and appropriate wound care that addresses the original source of injury.
Changing dressings without a plan may provide temporary moisture control while leaving the main problem unresolved. Your care should also address infection control, pressure, circulation, swelling, and the specific tissues present in the wound.
What determines the next step
A clinician can use the wound’s appearance, medical history, foot pulses, circulation tests, and the tissues around the wound to select care. The plan may change as drainage, swelling, circulation, or the wound itself changes.
Persistent venous ulcers, recurrent pressure ulcers, and diabetic foot ulcers need different combinations of care. Early assessment gives you more choices because it allows the underlying problem to be addressed before the wound expands or becomes infected.
Bottom Line
Persistent openness, drainage, wound tissue, and changes in nearby skin help distinguish a leg ulcer from a minor cut. Swelling and brown discoloration suggest venous insufficiency, a dry sharply outlined wound may indicate peripheral arterial disease, and a painless sole lesion may reflect diabetic sensory loss.
Recognizing what do leg ulcers look like helps you describe the wound, but it does not replace an examination of circulation, sensation, wound tissue, and surrounding skin. Prompt care matters when a wound enlarges, becomes discolored, drains heavily, or develops infection signs.
FAQ
What do leg ulcers look like?
Leg ulcers look like persistent open wounds on the lower legs and feet, often near the ankle. The center may contain moist red tissue, yellow slough, or dark tissue, while drainage, redness, swelling, scaling, or skin discoloration can appear around the wound.
Where do leg ulcers usually appear?
Leg ulcers usually appear around the ankle, lower leg, or foot. Venous wounds commonly sit near the inner ankle or just above the shoe line, while arterial and neuropathic wounds may affect the toes, foot, or sole.
What are the most common symptoms of a leg ulcer?
Common symptoms include an open sore, drainage, swelling, redness, scaling, skin discoloration, and tenderness. Some wounds cause pain, but reduced sensation or poor circulation can make discomfort mild or absent.
What causes leg ulcers?
Leg ulcers may develop from venous insufficiency, peripheral arterial disease, diabetic sensory loss, pressure, or inflammation. Venous problems often affect the ankle, while arterial problems can affect the feet and toes.
Are leg ulcers painful?
That be painful, tender, or uncomfortable, but pain is not a reliable measure of severity. Neuropathy, reduced circulation, or tissue damage can reduce sensation, so a painless wound can still require prompt assessment.
How can I tell whether a wound is a leg ulcer?
You cannot confirm the type or cause by appearance alone, but persistence, location, drainage, wound tissue, and surrounding skin changes can suggest an ulcer. A clinician can examine circulation and sensation to distinguish an ulcer from a minor cut, pressure injury, or skin condition.
