DAILY SERIES · WOUND LINE
Venous or arterial wound? Learn to tell them apart
The neighbor healed with a tight wrap. So why was your family member told never to squeeze? Because not all leg wounds are the same: some appear because the blood can't get back, and others because the blood can't get there. And the remedy for one can harm the other. In two minutes we show you the leg's two pipes, the signs that tell each wound apart, and the measurement that comes before any wrap is decided.
Educational content prepared with official health sources. Professional medical review pending.
No personalized diagnoses: consult your doctor.
📅 Published October 20, 2026 · 2-minute video · Full transcript included
Watch the direct video (without leaving this page) →
Two pipes: the one that delivers and the one that returns
Think of your leg as a house with two pipes: one brings the blood in — that's the artery — and the other sends it back to the heart — that's the vein. When one of them fails, the wound that appears is not the same… and neither is the care. Nobody fixes a pipe without knowing which one failed, and legs work the same way.
The return wound: venous
If the return fails, blood stays in the leg: pressure builds, the leg swells, and the skin slowly stains brown. A venous wound usually appears by the ankle, on the inner side: wide, shallow, with an irregular edge. It's the house flooding because the drain is blocked.
The delivery wound: arterial
If it's the delivery that fails, the tissue runs out of materials to repair itself. An arterial wound usually appears on the toes or the foot, with an edge that looks punched out: round, sharp, clean. It hurts more than the venous one, and the foot feels cold and looks pale. It's the house that ran out of water: there's nothing to rebuild with.
Note: these are general signs, the kind you discuss at an appointment. They're for raising the question, not for diagnosing at home — looking at it isn't enough to know which one it is.
The part almost nobody tells you: measure before you squeeze
Here's the key to this episode. For a venous wound, proper compression — applied by a professional — really does help it close, compared with no compression: that's what the Cochrane review by O'Meara and colleagues (2012) found across the compression trials in venous leg ulcers. The wrap helps the pooled blood climb.
But if the blood's arrival is severely blocked, squeezing is off-limits: it can damage tissue that's already receiving too little. That's why, before any compression, a specialist measures the circulation with a simple test that compares the pressure at your ankle with the pressure at your arm (the ankle-brachial pressure index). Weller and colleagues' 2019 review of clinical guidelines worldwide sums it up: when circulation is very low, no compression — and a specialist should be involved. Measure first. Treat second.
The honest fine print: mixed wounds
And there's a third case almost nobody mentions: both pipes failing at once. Hedayati and colleagues' 2015 review is precisely about those mixed arterial-venous ulcers, in the same leg, with features of both. One more reason not to copy the neighbor's remedy: the wrap that healed her wound is not a prescription for yours.
Ask this at your next visit
“Doctor, is this wound venous or arterial? Has my circulation been measured?”
If you remember one thing, make it this: measure before you squeeze — circulation first, treatment second.
Frequently asked questions
How do you tell a venous wound from an arterial one?
By general signs: a venous wound usually appears by the inner ankle, wide and shallow, with a swollen leg and brown-stained skin. An arterial wound usually appears on the toes or the foot, with a punched-out edge, hurts more, and the foot feels cold and looks pale. But these are signs to discuss at an appointment, not a diagnosis: the difference is confirmed by measuring the circulation.
Does compression help every leg wound?
No. It helps the venous one — the Cochrane review (O'Meara et al., 2012) found that proper compression, applied by professionals, helps it close compared with no compression. But if the blood's arrival is severely blocked, compression is contraindicated: it can damage the tissue. That's why circulation is assessed first.
What is the ankle-and-arm measurement?
It's a measurement that compares the blood pressure at your ankle with the pressure at your arm (the ankle-brachial pressure index). It shows how much blood is actually reaching the leg before a compression wrap is decided. A professional takes it with simple equipment, and the result decides whether squeezing is safe or a specialist needs to be involved (Weller et al., 2019).
Can a wound be venous and arterial at the same time?
Yes: those are mixed wounds, with both pipes failing in the same leg, and they're the subject of Hedayati et al.'s 2015 review. They carry features of both, and they're one more reason not to treat yourself by copying someone else's remedy.
Referencias
- Hedayati N., Carson J. G., Chi Y-W., Link D. Management of mixed arterial venous lower extremity ulceration: A review. Vascular Medicine 2015. doi:10.1177/1358863X15594683
- O'Meara S., Cullum N., Nelson E. A., Dumville J. C. Compression for venous leg ulcers. Cochrane Database of Systematic Reviews 2012; CD000265. doi:10.1002/14651858.CD000265.pub3
- Weller C. D., Team V., Ivory J. D., Crawford K., Gethin G. ABPI reporting and compression recommendations in global clinical practice guidelines on venous leg ulcer management: A scoping review. International Wound Journal 2019;16:406–419. doi:10.1111/iwj.13048
Full video transcript
Two wounds on the same leg can need opposite treatments. And the remedy for one can harm the other.
Think of your leg as a house with two pipes: one brings the blood in — that's the artery — and the other sends it back to the heart — that's the vein. When one of them fails, the wound that appears is not the same… and neither is the care.
If the return fails, blood stays in the leg: pressure builds, the leg swells, and the skin slowly stains. A venous wound usually appears by the ankle, on the inner side: wide, shallow, with an irregular edge.
If it's the delivery that fails, the tissue runs out of materials to repair itself. An arterial wound usually appears on the toes or the foot, with an edge that looks punched out. It hurts more, and the foot feels cold and looks pale.
Here's the part almost nobody tells you: for a venous wound, proper compression — applied by a professional — really does help it close. But if the blood's arrival is severely blocked, squeezing is off-limits: it can damage the tissue. That's why, before any compression, a specialist measures the circulation, comparing the pressure at your ankle with the pressure at your arm. Measure first. Treat second.
And the honest fine print: some wounds are mixed — both pipes failing at once. That's why looking at it at home isn't enough to know which one it is — and the wrap that healed your neighbor's wound is not a prescription for yours.
Take this with you: measure before you squeeze — circulation first, treatment second. At your visit, ask: “Doctor, is this wound venous or arterial? Has my circulation been measured?” The full chronic-wounds guide is at Red de Salud Hispana, and we'll connect you with a specialist who speaks your language. No commitment. We're not doctors. See you tomorrow.
🎬 Video from Red de Salud Hispana's daily series, chronic-wound line. Also on YouTube, Facebook, and Instagram. The full guide is at Chronic wounds.
Need a specialist in California?
Leave us your name, your phone number or your email, and we'll contact you with the information about the service you're looking for. We'll connect you with a specialist who speaks your language. No commitment.
We currently refer patients in California only. Your information is only used to contact you about this service; we don't share or sell it. This is not medical advice.
Is there a wound at home that won't close?
We put together the complete chronic-wound guide: the warning signs, what to do at home, what NOT to do, and when to see a doctor without waiting. Free, in plain words.
Read the chronic-wound guide →