Peripheral Artery Disease

What is peripheral artery disease?

Peripheral artery disease, often shortened to PAD, is a condition in which the arteries that carry blood to the arms and, most commonly, the legs become narrowed or blocked. Arteries are the blood vessels that deliver oxygen-rich blood from the heart to the rest of the body. When these vessels narrow, the muscles and tissues they supply receive less oxygen than they need, especially during activity such as walking.

The most frequent cause of this narrowing is atherosclerosis, a gradual buildup of fatty deposits called plaque on the inner walls of the arteries. Because atherosclerosis is a body-wide process, many people with peripheral artery disease also have narrowing in the arteries of the heart or brain, which is why PAD is considered an important warning sign for overall cardiovascular health.

Peripheral artery disease becomes more common with age and most often affects people over 50, although it can occur earlier, particularly in people who smoke or have diabetes. It affects both men and women. Some people have no noticeable complaints for years, while others develop pain, skin changes, or wounds that heal slowly. Understanding what is peripheral artery disease, how it is recognized, and how it is managed can help patients work with their doctors to protect both their legs and their heart.

Symptoms of peripheral artery disease

Peripheral artery disease symptoms vary widely. In many cases, especially in the early stages, there are no symptoms at all, or the signs are mild enough to be mistaken for normal aging, arthritis, or lack of fitness. When symptoms do appear, they usually relate to reduced blood flow in the legs.

Common signs and symptoms include:

• Claudication — cramping, aching, heaviness, or fatigue in the calf, thigh, or buttock muscles that appears during walking and eases after a few minutes of rest. This is the classic symptom of PAD.
• Leg pain at rest — pain in the feet or toes that occurs while lying down or at night and may improve when the legs hang over the side of the bed. This suggests more advanced disease.
• Numbness, tingling, or weakness in the legs or feet.
• Coldness in one lower leg or foot compared with the other side.
• Skin changes — shiny skin, hair loss on the legs or feet, thickened or slow-growing toenails, or a pale or bluish color.
• Sores or wounds on the toes, feet, or legs that heal slowly or do not heal at all.
• Weak or absent pulses in the feet, which a doctor may notice during an examination.

Doctors often describe PAD in stages. In the earliest stage, the arteries are narrowed but the person feels nothing unusual. As narrowing progresses, claudication appears — first only after long walks, then after shorter and shorter distances. In the most advanced stage, called critical limb ischemia (severely reduced blood flow that threatens the limb), pain occurs even at rest, and non-healing wounds or tissue death (gangrene) can develop. Rest pain, ulcers, and color changes in the foot are warning signs that need prompt medical attention, because advanced disease can put the limb at risk.

It is worth noting that people with diabetes may feel less pain because of nerve damage (neuropathy), so they can have significant artery narrowing without typical peripheral artery disease symptoms. For this reason, regular foot checks are often recommended for people with diabetes.

Causes and risk factors

The main peripheral artery disease causes relate to atherosclerosis, the same process that leads to most heart attacks and many strokes. Over years, cholesterol, calcium, and other substances form plaques inside the artery wall. These plaques stiffen the artery and narrow the channel through which blood flows. Less commonly, PAD can result from inflammation of the blood vessels (vasculitis), injury to a limb, unusual anatomy of muscles or ligaments pressing on an artery, or blood clots.

Several factors increase the likelihood of developing peripheral artery disease:

• Smoking — this is one of the strongest risk factors. Tobacco use damages the artery lining and speeds up plaque formation. Current and former smokers are at substantially higher risk than people who never smoked.
• Diabetes — high blood sugar over time injures blood vessels and is closely linked to PAD, particularly in the smaller arteries below the knee.
• High blood pressure (hypertension) — puts extra strain on artery walls.
• High cholesterol — excess cholesterol in the blood contributes directly to plaque buildup.
• Older age — risk rises steadily after about age 50, and earlier in people who smoke or have diabetes.
• Family history — having close relatives with PAD, heart disease, or stroke increases risk.
• Obesity and physical inactivity — both are associated with atherosclerosis and its complications.
• Chronic kidney disease — impaired kidney function is linked to more widespread artery disease.

Many of these factors act together. A person who smokes and has diabetes, for example, carries a much higher risk than someone with a single risk factor. The encouraging point is that several of the most important causes — smoking, blood pressure, cholesterol, and blood sugar — can be treated or modified, which is central to managing the disease.

Diagnosis of peripheral artery disease

Peripheral artery disease diagnosis usually begins with a conversation and a physical examination. The doctor asks about leg pain, walking distance, wounds, smoking, and other cardiovascular conditions, then examines the legs and feet, checking skin color, temperature, hair growth, and the pulses at the groin, behind the knee, and in the feet. Weak or missing pulses raise suspicion of narrowed arteries.

Several tests help confirm the diagnosis and show how severe the narrowing is:

• Ankle-brachial index (ABI) — the most common first test. Blood pressure is measured at the ankle and at the arm using a cuff and a small ultrasound probe, and the two values are compared. A lower pressure at the ankle than at the arm indicates reduced blood flow to the leg and supports the diagnosis of PAD. Sometimes the test is repeated after walking on a treadmill, because exercise can reveal narrowing that is not obvious at rest.
• Doppler and duplex ultrasound — a painless scan that uses sound waves to show blood flow through the arteries and locate where they are narrowed or blocked.
• CT angiography or MR angiography — detailed imaging tests, often using a contrast dye, that create a map of the arteries. These are frequently used when a procedure or operation is being considered.
• Catheter angiography — an invasive test in which a thin tube (catheter) is placed into an artery and dye is injected to produce very precise images. Today this is usually reserved for situations where treatment can be performed at the same time.
• Blood tests — cholesterol, blood sugar, and kidney function tests help identify risk factors and guide treatment; they do not diagnose PAD by themselves.

Because atherosclerosis rarely affects only one part of the body, doctors may also assess the heart and other arteries once PAD is confirmed. Peripheral artery disease is typically managed by specialists in vascular medicine, vascular surgery, and cardiology; in the Acibadem network, evaluation of cardiovascular risk factors associated with PAD is among the areas covered by the Cardiology Department.

Treatment options for peripheral artery disease

Peripheral artery disease treatment has two main goals: relieving leg symptoms so that walking and daily life become easier, and lowering the risk of heart attack, stroke, and limb loss. The right combination of treatments depends on how severe the disease is, where the narrowings are located, and the person’s overall health. Treatment plans are individual, and your doctor may adjust them over time.

Lifestyle measures and supervised exercise

For many people with mild or moderate symptoms, lifestyle change is the foundation of treatment rather than a mere add-on.

• Stopping smoking is the single most important step for anyone with PAD who smokes. Continued smoking speeds up the disease and worsens outcomes after any procedure. Doctors can offer counseling and medications to support quitting.
• Structured walking programs — regularly walking to the point of moderate leg discomfort, resting, and then continuing has been shown to improve pain-free walking distance in many patients. Supervised exercise programs, where available, are often recommended.
• Heart-healthy diet, weight management, and control of blood pressure and blood sugar all support the health of the arteries.
• Careful foot care — keeping feet clean, moisturized, and protected, and checking daily for cuts or sores, is especially important for people with diabetes or advanced PAD, because minor injuries can become serious wounds when blood flow is reduced.

Medications

Medicines do not remove existing plaque, but they slow the disease, reduce cardiovascular risk, and can ease symptoms. Commonly used options include:

• Antiplatelet drugs — medications such as low-dose aspirin or clopidogrel that make blood less likely to clot inside narrowed arteries, lowering the risk of heart attack and stroke.
• Statins — cholesterol-lowering drugs that also stabilize plaques and are recommended for most people with PAD, regardless of their cholesterol level.
• Blood pressure medications — to keep pressure within a target range set by the doctor.
• Diabetes medications — to keep blood sugar well controlled.
• Symptom-directed medication — in some countries, drugs such as cilostazol may be prescribed to improve walking distance in selected patients with claudication. Not everyone is a candidate, and your doctor will weigh the benefits and side effects.

Procedures and surgery

When symptoms significantly limit daily life despite exercise and medication, or when blood flow is so reduced that the limb is threatened, doctors may recommend a procedure to reopen or bypass the blocked artery.

• Angioplasty and stenting — a minimally invasive procedure in which a thin catheter is guided into the narrowed artery and a small balloon is inflated to widen it. Often a stent, a small metal mesh tube, is left in place to help keep the artery open. Most patients recover relatively quickly, though narrowing can sometimes recur over time.
• Atherectomy — a catheter-based technique that removes or shaves plaque from inside the artery, used in selected cases.
• Bypass surgery — an open operation in which the surgeon uses a segment of the patient’s own vein or a synthetic tube to route blood around the blocked section. Bypass is generally reserved for long or complex blockages or when less invasive options are not suitable.
• Wound care and, rarely, amputation — for advanced disease with non-healing wounds or tissue death, specialized wound care is essential. Amputation of a toe, part of the foot, or the leg is considered only when blood flow cannot be restored and the tissue cannot be saved; earlier diagnosis and treatment aim to prevent reaching this stage.

It is important to understand that watchful waiting — regular monitoring combined with risk-factor treatment and exercise, without any procedure — is an appropriate and evidence-based strategy for many people whose symptoms are mild. Procedures carry their own risks, and doctors generally reserve them for cases where the expected benefit clearly outweighs those risks.

Living with peripheral artery disease and outlook

Peripheral artery disease is a chronic, long-term condition. Existing plaque does not usually disappear, but its progression can often be slowed considerably, and many people maintain a good quality of life for years with consistent treatment. Walking ability frequently improves with a regular exercise program, and symptoms may stabilize or even lessen when risk factors are well controlled.

The outlook depends on several factors, including how advanced the disease is at diagnosis, whether smoking continues, how well diabetes and blood pressure are managed, and the health of the heart and other arteries. Because PAD signals atherosclerosis throughout the body, people with the condition face a higher-than-average risk of heart attack and stroke. This is why treatment focuses as much on protecting the heart and brain as on relieving leg pain. Taking prescribed medications consistently, attending follow-up appointments, inspecting the feet regularly, and staying physically active within the limits advised by a doctor are the practical pillars of living with peripheral artery disease.

Honest expectations matter: no treatment can guarantee that the disease will not progress, and some patients eventually need a procedure even after years of stability. However, most people with PAD who address their risk factors do not go on to lose a limb, and early recognition gives the best chance of a favorable course.

Frequently asked questions

What is peripheral artery disease in simple terms?

Peripheral artery disease is a narrowing of the arteries — usually in the legs — caused most often by a buildup of fatty deposits called plaque. The narrowed arteries deliver less oxygen-rich blood to the muscles, which can cause cramping leg pain during walking, cold feet, slow-healing wounds, and, in advanced cases, pain even at rest.

Can peripheral artery disease be cured or reversed?

There is currently no cure that removes the underlying atherosclerosis entirely. However, the condition can often be managed effectively. Quitting smoking, exercising regularly, and taking medications for cholesterol, blood pressure, and blood clot prevention can slow or stabilize the disease, and procedures can restore blood flow when needed. Many people experience meaningful improvement in symptoms, although ongoing care remains necessary.

How serious is peripheral artery disease?

Seriousness varies from person to person. Mild PAD may cause few problems for years, while advanced disease can threaten the limb and is associated with a higher risk of heart attack and stroke, because the same plaque process usually affects arteries elsewhere in the body. This is why doctors treat PAD as an important cardiovascular condition even when leg symptoms are mild.

What does peripheral artery disease pain feel like?

The classic symptom is claudication: a cramping, aching, or tired feeling in the calf, thigh, or buttock that starts during walking and fades within minutes of resting. In more advanced disease, pain can occur in the feet or toes at rest, often at night, and may ease when the legs are lowered. Some people, particularly those with diabetes, feel little or no pain despite significant narrowing.

How do doctors diagnose peripheral artery disease?

Diagnosis usually starts with an examination of the leg pulses and skin, followed by an ankle-brachial index test, which compares blood pressure at the ankle with pressure at the arm. Ultrasound scans can show where arteries are narrowed, and CT, MR, or catheter angiography may be used to map the arteries in detail, particularly if a procedure is being planned.

Is walking good or bad for peripheral artery disease?

For most people with PAD, walking is beneficial and is a core part of treatment. Structured walking — moving until moderate leg discomfort appears, resting briefly, then continuing — often increases pain-free walking distance over weeks to months. Patients with rest pain, foot wounds, or other advanced signs should follow their doctor’s individual advice, since exercise recommendations differ in severe disease.

What is the recovery like after angioplasty or bypass surgery?

Recovery after angioplasty and stenting is usually relatively quick, and many patients return to normal activities within days, depending on individual circumstances. Bypass surgery is a larger operation and typically involves a longer hospital stay and a recovery period of several weeks. In both cases, continuing medications, not smoking, and staying active are important, because arteries can narrow again if risk factors are left untreated. Your care team will give you a personalized recovery plan.

When to see a doctor

Anyone who notices recurring leg pain during walking, unexplained cold or numb feet, or slow-healing sores on the legs or feet should discuss these symptoms with a doctor, especially people over 50 or those who smoke or have diabetes. Early evaluation allows treatment to begin before the disease advances.

Seek urgent medical attention if you experience any of the following red-flag warning signs, which can indicate severely blocked blood flow and a limb at risk:

• Sudden severe pain, coldness, paleness, or numbness in a leg or foot — this may signal an acute artery blockage and is a medical emergency.
• Leg or foot pain at rest, particularly at night, that does not go away.
• A wound, ulcer, or sore on the foot or leg that is not healing, or that becomes red, swollen, warm, or begins to drain fluid.
• Blackened or darkening skin on the toes or foot, which may indicate tissue death.
• Signs of infection with fever in a person who has a foot wound and known or suspected PAD.
• Chest pain, sudden weakness on one side of the body, difficulty speaking, or sudden vision loss — possible signs of heart attack or stroke, which are more common in people with peripheral artery disease and require emergency care.

Peripheral artery disease is common, and it is treatable. Timely medical assessment, honest attention to risk factors, and consistent follow-up give most patients the best chance of protecting both their mobility and their long-term cardiovascular health.