Gangrene and Pressure Ulcers: What to Look For and When to Act
Quick Summary
- Gangrene is a medical emergency — look for black or dark skin, severe pain (or numbness), and foul-smelling wounds
- Ulcers can appear on the feet and ankles, not just the soles
- Venous ulcers are usually wet, shallow, and around the ankle
- Arterial ulcers are often deep, dry, painful, and on toes, feet, or ankles
- Any wound that doesn’t heal or changes colour should be checked by a healthcare professional
What Is Gangrene?
Gangrene is a serious condition where body tissue dies. This usually happens because of poor blood flow, infection, or both.
Gangrene most often affects the toes, feet, and sometimes the ankles, but it can occur in other areas as well.
Signs of Gangrene
- Skin turning black, purple, or darkened
- Swelling or severe pain (or sometimes numbness)
- Skin that feels cold or hard
- Foul-smelling discharge
- A wound that is not healing
Gangrene requires urgent medical attention.
What Are Pressure Ulcers?
Pressure ulcers are wounds caused by pressure, poor circulation, or skin damage. They can develop on the feet and ankles, especially around the heel, sides of the foot, and ankle areas.
Two common types are caused by vein problems and artery problems.
Venous Ulcers (Venous Insufficiency)
Chronic venous insufficiency occurs when blood has difficulty flowing back up the legs. Venous ulcers are most commonly found around the inner ankle.
What to Look For
- Shallow wounds with uneven edges
- Red, moist appearance
- Fluid or leakage
- Swelling in the lower leg
- Skin that looks brown, purple, or discoloured
- Aching or heaviness in the leg
Arterial Ulcers (Poor Blood Supply)
Peripheral arterial disease is often caused by atherosclerosis, which reduces blood supply. These ulcers can appear on the toes, feet, or ankles, especially in pressure areas.
What to Look For
- Small, deep wounds with clear edges
- Dry, pale, or dark (black) tissue
- Pain, especially at rest or during the night
- Cold skin or reduced sensation
- Weak or absent pulses in the feet
Why Early Detection Matters
Without treatment, ulcers can become infected and may lead to serious complications, including gangrene.
Checking your feet and ankles regularly can help you catch problems early.
When to Seek Medical Help
Get medical advice if you notice:
- A wound that isn’t healing
- Changes in skin colour or temperature
- Increasing pain, swelling, or discharge
Remember to check both your feet and ankles, as ulcers often develop in these areas.
Final Thoughts
Gangrene and ulcers are serious conditions, but early action can make a big difference. Knowing what to look for and acting quickly can help prevent complications and protect your health.