Understanding Your Circulation

What Causes Peripheral Artery Disease?

Peripheral artery disease develops when plaque, made up of cholesterol, fatty deposits, and other substances circulating in the blood, gradually builds up inside the arteries supplying the legs. Over time, this buildup, called atherosclerosis, narrows the space available for blood to flow through, which is the same basic process responsible for coronary artery disease affecting the heart.

The risk factors that contribute to peripheral artery disease are largely the same ones associated with cardiovascular disease more broadly. High blood pressure and high cholesterol both place ongoing stress on artery walls, making it easier for plaque to accumulate over the years. Diabetes is a particularly significant risk factor, since elevated blood sugar levels can damage blood vessels throughout the body, including the arteries in the legs.

Smoking is one of the most significant contributors to peripheral artery disease specifically, since it directly damages the lining of blood vessels and accelerates plaque buildup considerably. Age also plays a role, simply because arteries have more time to accumulate plaque buildup over the course of a longer life. Because this underlying process affects arteries throughout the body rather than just the legs, someone with peripheral artery disease often has some degree of the same process occurring elsewhere in their cardiovascular system as well.

What Are the Symptoms of Peripheral Artery Disease?

The classic symptom of peripheral artery disease is leg pain or cramping that occurs during walking or physical activity and eases with rest, called claudication, most often felt in the calf muscles. This pattern, discomfort during exertion that predictably improves once movement stops, is one of the more recognizable features used to help identify the condition.

As the condition progresses, some people begin experiencing pain even while at rest, which represents a more significant reduction in blood flow than the exercise-related pattern alone. Coldness in the lower leg or foot compared to the rest of the body is another common symptom, along with slow-healing wounds or sores, particularly on the feet or toes, since reduced blood flow makes it harder for the body to heal minor injuries in that area.

Skin color changes, including a paler or bluish appearance in the affected leg or foot, can also occur as circulation becomes more limited. Not everyone with peripheral artery disease notices symptoms, especially in earlier stages, which is part of why understanding personal risk factors matters even for people who feel completely fine walking and moving through their day.

How Is Peripheral Artery Disease Diagnosed?

Diagnosing peripheral artery disease typically begins with a discussion of symptoms, particularly any pattern of leg discomfort during walking that improves with rest, along with a review of cardiovascular risk factors like blood pressure, cholesterol, diabetes, and smoking history. A physical examination often includes checking the pulses in the legs and feet, along with looking for any skin changes or slow-healing wounds.

A common and simple test used to evaluate blood flow compares blood pressure readings taken at the ankle and the arm, since a meaningful difference between the two can indicate reduced circulation in the legs. This comparison provides a useful, non-invasive way to estimate how significantly blood flow has been affected.

If more detailed evaluation is needed, imaging that directly visualizes blood flow through the leg arteries can help pinpoint the location and severity of any narrowing. Because peripheral artery disease shares many of the same underlying risk factors as heart disease, evaluation sometimes includes a broader look at cardiovascular health overall, rather than focusing on the legs in isolation.

Is Peripheral Artery Disease Connected to Heart Disease?

Peripheral artery disease and coronary artery disease share the same underlying process, plaque buildup narrowing the arteries, just occurring in different locations throughout the body. Because of this shared mechanism, people with peripheral artery disease often have some degree of the same process affecting the arteries supplying their heart as well, even without any noticeable cardiac symptoms.

This connection means that a diagnosis of peripheral artery disease is often viewed as a meaningful signal about someone's broader cardiovascular health, not just an isolated issue affecting the legs. Recognizing plaque buildup in one part of the body raises reasonable questions about whether similar changes might be occurring elsewhere, even in arteries that haven't yet caused any noticeable symptoms.

This relationship works in the other direction as well. Someone already diagnosed with heart disease has an increased likelihood of also having some degree of peripheral artery disease, even if they haven't noticed leg symptoms. Because of this strong overlap, peripheral artery disease is best understood as one visible piece of a person's overall cardiovascular picture, rather than a separate, unrelated condition confined to the legs.

How Can I Support My Circulation Day to Day?

Regular walking, ideally as part of a consistent routine, is one of the most well-supported everyday habits for supporting circulation in the legs, even for people already experiencing some degree of peripheral artery disease. Over time, consistent walking can help the body develop alternate small blood vessels that support circulation around narrowed areas.

Avoiding tobacco use is one of the most significant steps for supporting healthy circulation, since smoking directly damages blood vessels and accelerates the narrowing process throughout the body. Managing blood pressure, cholesterol, and blood sugar levels through everyday habits like a balanced diet and regular physical activity also supports healthier circulation over time.

Taking good care of the feet is particularly important for anyone with reduced circulation, since minor injuries can heal more slowly when blood flow is limited. This includes checking feet regularly for any cuts, blisters, or sores, wearing properly fitted shoes, and keeping the skin on the feet moisturized to prevent cracking.

Staying consistent with routine checkups allows blood pressure, cholesterol, and other cardiovascular risk factors to be monitored over time, since these numbers can shift gradually without any noticeable symptoms, even while they continue to influence circulation throughout the body.