Peripheral artery disease — circulation problems and their consequences

Reviewed by a board-certified medical writer specializing in vascular medicine and geriatric cardiovascular care

Your parent's legs hurt when they walk, their feet are always cold, and a small scrape on their heel has not healed in three weeks. These seemingly unrelated symptoms point to peripheral artery disease, a condition where narrowed arteries reduce blood flow to the legs and feet. This article explains what PAD is, why it signals serious systemic vascular disease, what can be done about it, and why wound care becomes a critical priority.

PAD Means Your Parent's Blood Is Not Getting Where It Needs to Go

Your parent mentions their legs hurt when they walk. Not their knees or joints, but a cramping, heavy sensation in the calves that gets worse the further they go. They stop and rest, the pain fades, and they can walk again for a bit before it happens all over. You wonder if they are just getting older. Then you notice something else: their feet are always cold, even when everyone else is warm. There is a small scrape on their heel that has been there for three weeks and barely looks like it is healing.

These observations, strung together, point to something called peripheral artery disease. What it really means is that your parent's blood is not getting where it needs to go. The arteries in their legs are narrowing, blood flow is dropping, and their body is struggling to deliver oxygen to tissues that need it. It did not show up overnight. It has been building for years, quietly, while no one was paying close attention.

According to the AHA, peripheral artery disease affects approximately 8.5 million Americans over the age of 40, and prevalence increases sharply with age. Among adults over 70, the CDC estimates that roughly 15 to 20 percent have PAD, though many cases go undiagnosed because symptoms are attributed to normal aging. PAD is one of those conditions that people often miss or dismiss. Your parent might not take it seriously because the symptoms come and go. You might not take it seriously because they seem fine when they are sitting down. But PAD is telling you something important about your parent's overall vascular health, and vascular health is basically the health of their entire body.

The arteries in your parent's body are pipelines carrying blood with oxygen throughout their system. PAD develops when plaque, made up of cholesterol, fat, and other substances, builds up on the inside walls of the arteries that lead to the legs, feet, and other extremities. This narrows the diameter of the artery. Less space means less blood can flow through. Less blood flow means less oxygen reaching the tissues downstream.

The process usually starts years or decades before anyone notices a problem. Your parent might have been developing this narrowing throughout their fifties and sixties without any symptoms. The body has a remarkable ability to compensate for a while. But as the narrowing worsens and more arteries become affected, blood flow cannot keep up with the demands of activity. That is when the cramping starts. When your parent walks, their leg muscles are working hard and demanding oxygen. If the arteries are too narrow to deliver it, the muscles cramp, similar to how you would feel if you held your breath while exercising. The pain goes away when they stop because the resting muscles do not demand much oxygen.

PAD Is Not Just a Leg Problem

Your first instinct might be that peripheral artery disease is mainly about your parent's legs. It is not. PAD is a marker of serious systemic disease. It is evidence of atherosclerosis, meaning the narrowing is happening throughout your parent's arterial system, not just in the legs. The same process is likely occurring in the coronary arteries that feed the heart and the arteries in the brain.

The statistics are sobering. According to the AHA, a person with peripheral artery disease has two to six times the risk of cardiovascular death compared to someone without PAD. The NIH reports that patients with PAD have roughly double the risk of heart attack and stroke. The five-year mortality rate for patients with symptomatic PAD is approximately 30 percent, most of which is due to heart attack and stroke rather than the leg disease itself. These are not small numbers. PAD is not a condition you can safely ignore because it only affects your parent's legs.

The classic symptom is leg pain that comes on with walking and goes away with rest. Doctors call this claudication, from a Latin word meaning to limp. The pain usually shows up in the calf, though it can also appear in the thigh or buttocks depending on which arteries are affected. The amount of distance your parent can walk before the pain starts matters. If they can make it halfway down the block, that is one level of severity. If they can barely make it across the living room, that is worse. Doctors use this claudication distance to help determine how serious the narrowing has become.

Pain while walking is not the only symptom. Your parent might have feet that are chronically cold even in warm weather. The skin on their lower legs and feet might look pale or slightly discolored. Hair on their legs might be thinning or have disappeared entirely. Toenails might become thick and brittle. These are not dramatic symptoms, and they are easy to miss or attribute to aging, but they are all signs of reduced blood flow.

The most concerning symptom is slow-healing wounds. A small cut, a blister from a shoe, a toenail clipped too short: all of these should heal within a week or two in a healthy person. In someone with PAD, healing becomes slow and difficult because the blood supply is compromised and the body cannot mount an effective healing response. A simple wound that should not be notable becomes concerning because it is not improving.

Some people with PAD report pain in their legs even at rest, especially at night. This is usually a sign of more severe disease. Additionally, PAD can progress. The narrowing can worsen over time. In some cases, an artery can become so blocked that blood can no longer flow through at all. This can lead to what is called critical limb ischemia, where tissues in the leg or foot are not getting enough blood to survive. If not treated, this can lead to tissue death and potentially amputation. That is an extreme outcome, but the NIH reports that 5 to 10 percent of patients with PAD progress to critical limb ischemia within five years. Many people with PAD remain stable for years. Others improve with treatment. The key is actually knowing you have it and then doing something about it.

Treatment Starts With Diagnosis and Risk Factor Management

If your parent has symptoms that sound like PAD, they need to see their doctor. The doctor will likely do a physical exam, checking the pulses in their legs and feet and listening to the arteries with a stethoscope. They will likely order an ankle-brachial index test, which compares blood pressure in the ankle to blood pressure in the arm. If the ankle pressure is significantly lower, it suggests reduced blood flow. They might also do an ultrasound study called a duplex scan to visualize the narrowing.

Once diagnosed, treatment usually starts with medication. Aspirin is typically prescribed to prevent blood clots. Statins are prescribed to lower cholesterol and reduce plaque buildup. Blood pressure medications might be added or adjusted. Some doctors prescribe cilostazol, which improves blood flow and walking distance. The medications are not treating PAD directly so much as reducing the risk of progression and reducing overall cardiovascular risk.

Lifestyle changes are equally important, and possibly more so. Your parent needs to stop smoking if they smoke. The AHA identifies smoking as the single strongest risk factor for PAD development and progression. They need to control blood pressure, cholesterol, and blood sugar if they have diabetes. They need to get physically active, specifically in ways that push them to walk past their claudication distance. This seems counterintuitive: walking to the point of pain seems like it should make things worse. But supervised exercise programs for PAD have strong evidence supporting their effectiveness. According to the ACC (American College of Cardiology), structured exercise programs improve walking distance by 50 to 200 percent in patients with claudication. The theory is that exercise prompts the body to develop collateral blood vessels, providing alternative routes for blood to reach the tissues.

Diet matters. A heart-healthy diet low in saturated fat and high in vegetables, whole grains, and lean protein is standard. Weight loss if overweight. The fundamental approach to PAD is similar to the approach to any atherosclerotic disease: reduce the risk factors that caused the problem and try to slow or stop the progression.

If lifestyle changes and medications are not working, if the claudication distance keeps getting shorter or symptoms affect quality of life significantly, then procedural intervention becomes an option. An interventional radiologist or vascular surgeon might do an angiogram to get a detailed picture of exactly where the narrowing is. For a single blockage or short narrowing, they might do an angioplasty with a balloon to open the artery, and possibly place a stent to keep it open. In more severe cases, they might do a bypass surgery, routing blood around the blocked segment through a graft. These are significant procedures, especially in older adults, and they are not first-line treatment. They are considered when medications and lifestyle are not working and symptoms are severe enough to justify the risks.

Wound Care Becomes a Critical Priority

This is the piece that can turn peripheral artery disease from a manageable chronic condition into a serious crisis. If your parent has PAD and they get a wound, that wound is in danger. Even a small injury that should heal easily becomes a threat because the blood supply is already compromised.

You need to help your parent protect their feet and legs. This means checking their feet daily for any cuts, scrapes, blisters, or areas of redness or swelling. It means being careful about nail care, ideally having a professional trim their toenails because the risk of inadvertent cuts is higher. It means making sure they wear shoes that fit properly without rubbing or pinching. It means treating any wound, no matter how small it seems, as something that needs attention.

If your parent does get a wound, it needs to be kept clean and monitored closely. Any signs of infection, including increasing redness, warmth, swelling, discharge, or odor, require prompt medical attention. A small infection in someone with normal circulation might resolve on its own. In someone with PAD, the same small infection can become serious because the body cannot deliver sufficient immune cells to fight it. Wounds that do not show signs of improvement within a few days should be evaluated by a healthcare provider, ideally someone with expertise in wound care.

This is genuinely one of the situations where prevention is far more effective than treatment after the fact. Your parent with PAD getting a severe foot infection is a medical crisis. Your parent with PAD keeping their feet clean, checking them daily, and getting prompt treatment of any injury is managing their condition responsibly.

The Conversation Your Parent Needs to Have

If your parent has symptoms that sound like PAD, they need to talk to their doctor. If they have already been diagnosed, they need to understand what it means and why treatment matters. PAD is real and important, but it is also manageable. Many people live well with peripheral artery disease for years or decades when they are taking care of themselves and following medical advice.

The risk factors that caused PAD, including smoking, high cholesterol, high blood pressure, diabetes, and lack of physical activity, are the same risk factors that cause heart disease and stroke. Managing PAD effectively means managing overall cardiovascular health, which matters for everything.

Your parent also needs to understand that their feet and legs need conscious attention now. Daily checks. Good footwear. Prompt treatment of any wounds. This is something they have direct control over. They cannot necessarily control whether they had a genetic predisposition to atherosclerosis, but they can control whether they protect their feet carefully.

And you need to understand it too, because you are going to be watching for symptoms, asking the right questions, and sometimes being the person who insists on medical evaluation when your parent is inclined to minimize what they are experiencing. You are also going to be the one supporting lifestyle changes, attending appointments, and helping problem-solve if treatment is not working as well as hoped.

Peripheral artery disease is one of those conditions where understanding what is actually happening makes everything else easier. Your parent's legs are not just getting old and weak. Their arteries are narrowing. Their body is struggling to deliver blood where it is needed. That is a real problem with real solutions. It is worth taking seriously.

Frequently Asked Questions

How is PAD diagnosed?
The primary screening test is the ankle-brachial index (ABI), which compares blood pressure in the ankle to blood pressure in the arm. An ABI of 0.90 or lower suggests PAD. The test is painless, takes about 15 minutes, and can be done in your parent's doctor's office. Additional testing might include duplex ultrasound, CT angiography, or MR angiography if the doctor needs more detail about the location and severity of the narrowing.

Can PAD be reversed?
The narrowing itself typically cannot be fully reversed, but the progression can be slowed or stopped, and symptoms can improve significantly. The ACC reports that structured exercise programs can improve walking distance by 50 to 200 percent. Medications reduce cardiovascular risk and may stabilize plaque. Smoking cessation is the single most impactful change your parent can make.

Is PAD the same as having blocked arteries in the heart?
PAD and coronary artery disease are caused by the same underlying process: atherosclerosis, the buildup of plaque in arterial walls. They are different manifestations of the same systemic disease. Having PAD is a strong indicator that atherosclerosis is present elsewhere in the body, which is why people with PAD have significantly elevated risk of heart attack and stroke.

My parent has diabetes and PAD. Is that more dangerous?
Yes. Diabetes accelerates atherosclerosis and also causes nerve damage (neuropathy) that can reduce sensation in the feet, meaning your parent might not feel a wound that is developing. The combination of reduced blood flow from PAD and reduced sensation from diabetes makes foot complications significantly more likely. The CDC reports that diabetes is present in roughly 20 to 30 percent of PAD patients, and these patients have higher rates of amputation.

Should my parent stop walking if their legs hurt?
No. Supervised walking programs are one of the most effective treatments for PAD-related claudication. The guidelines from the AHA and ACC recommend walking to the point of moderate claudication pain, resting until the pain subsides, and then resuming. Over weeks to months, this approach improves walking distance. Your parent should discuss an exercise plan with their doctor, and ideally participate in a supervised exercise program if one is available.

When does PAD become an emergency?
Seek emergency care if your parent experiences sudden severe leg pain, a leg or foot that becomes cold, pale, or numb, or if they develop a wound with rapidly spreading redness, warmth, or signs of gangrene (darkened or blackened skin). These may indicate acute limb ischemia or severe infection, both of which require immediate medical intervention.