Pain in your legs when you walk may seem like a normal part of getting older, but sometimes it points to a problem with blood flow.
Peripheral artery disease, or PAD, develops when arteries carrying blood to the limbs become narrowed or blocked, most often affecting the legs.
The arteries normally deliver oxygen-rich blood from the heart to tissues throughout the body. When blood flow to the leg muscles becomes limited, those muscles may not receive enough oxygen during activity, when they need it most.
A classic sign of PAD is aching, cramping or heaviness that begins while walking and improves after a few minutes of rest. The discomfort often affects the calf but can also appear in the thigh or buttock, depending on where an artery has narrowed.
Not everyone with PAD has this typical pain. Some people notice weakness, numbness or unusual tiredness in a leg, while many people have few or no obvious symptoms.
Other possible warning signs include one foot feeling colder than the other, slow-healing sores on the feet or toes, and changes in the skin. Severe loss of blood flow can cause pain even while resting and may eventually damage or kill tissue.
PAD is usually caused by atherosclerosis, the same disease process involved in many heart attacks and strokes. Fatty material and other substances collect inside artery walls over time, making the space available for blood to flow increasingly narrow.
This connection is important because PAD is not simply a problem with the legs. A person with narrowed leg arteries may also have unhealthy arteries elsewhere in the body, which means PAD is linked to a higher risk of heart attack and stroke.
Smoking is one of the strongest risk factors for the disease. Diabetes, high blood pressure, unhealthy cholesterol levels, older age and a history of cardiovascular disease can also increase the chance of developing PAD.
Doctors can often begin checking for PAD with a simple test called the ankle-brachial index. It compares blood pressure measured at the ankle with blood pressure in the arm to see whether blood is reaching the legs normally.
If more information is needed, ultrasound or other imaging tests can help doctors locate narrowed or blocked arteries. Early diagnosis matters because treatment can improve walking ability while also reducing the risk of serious cardiovascular problems.
Exercise is an important part of treatment for many people with PAD. Structured walking programs can gradually help people walk farther with less discomfort, although exercise should be planned with medical guidance when symptoms are significant.
Stopping smoking is also extremely important because tobacco damages blood vessels and speeds up artery disease. Managing diabetes and blood pressure, eating a heart-healthy diet and controlling cholesterol can further protect the arteries.
Doctors may prescribe medicines to lower cholesterol and reduce the chance of dangerous blood clots. Some patients may also need treatment specifically aimed at improving walking symptoms or controlling other cardiovascular risks.
When blood flow is severely reduced or symptoms remain disabling despite other treatment, a procedure may be needed. Doctors can sometimes reopen an artery using a small balloon and possibly a stent, while bypass surgery can create another route for blood around a major blockage.
Clinical guidance and research published by organizations including the American Heart Association and American College of Cardiology emphasize early diagnosis, regular exercise, smoking cessation and strong control of cardiovascular risk factors in people with PAD.
Recognizing unexplained leg pain or slow-healing foot wounds can therefore do more than protect mobility—it may also uncover a wider threat to heart and blood vessel health.
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