When an artery in the leg becomes completely blocked, the tissue below it is suddenly cut off from oxygen. Doctors call this acute limb ischemia, and it is a medical emergency: without treatment, muscles and nerves can be permanently damaged within hours.
Vascular surgeons at Riverton General Hospital say many patients wait too long before seeking help, often because they mistake the first symptoms for a cramp or a pulled muscle.
The signs to watch for
Doctors often teach the warning signs as a short checklist. A sudden blockage usually causes one or more of these in a leg or foot:
- severe pain that comes on quickly and does not ease with rest
- skin that looks pale, bluish or mottled
- a foot that feels clearly colder than the other one
- numbness, tingling or a “pins and needles” feeling
- weakness, or difficulty moving the toes or foot
- a pulse in the foot that is weak or cannot be felt
If one leg suddenly turns cold, pale and painful, don’t wait to see if it passes. Call emergency services. The sooner we restore blood flow, the better the chance of saving the limb.
Dr. Mirela Hadzic, vascular surgeon at Riverton General Hospital
Earlier clues that are easy to miss
A sudden blockage often happens in arteries that have been narrowing for years. That slower condition, peripheral artery disease, has its own warning signs: cramping pain in the calf or thigh when walking that goes away after a few minutes of rest, wounds on the feet or toes that heal slowly, shiny skin, hair loss on the legs, or one foot that is often colder than the other.
These symptoms are not an emergency, but they are a reason to see a doctor soon. A simple test comparing blood pressure in the ankle and the arm can show whether blood flow is reduced.
It is also important not to confuse arteries with veins. A clot in a deep vein usually causes a swollen, warm and red leg rather than a cold, pale one. It needs urgent care too, but the treatment is different.
Who is most at risk
Smoking is the single biggest risk factor, followed by diabetes, high blood pressure, high cholesterol and an irregular heartbeat, which can send small clots into the arteries. The risk rises with age.
Doctors say regular walking, quitting smoking and keeping blood sugar, blood pressure and cholesterol under control all help protect the arteries. If you have any of these risk factors or symptoms, talk to your family doctor.
This article is general information and does not replace medical advice.
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