Peripheral Arterial Disease (PAD): Symptoms, Diagnosis, and Treatment Options

Peripheral arterial disease (PAD) is a narrowing or blockage of arteries outside the heart and brain, most often in the legs. It develops when atherosclerosis — the buildup of plaque inside artery walls — reduces blood flow to the limbs. PAD is common in older adults and in people who smoke or have diabetes, and it matters because it can limit walking, cause non-healing wounds, and signal elevated cardiovascular risk. The sections below cover who is at risk, how PAD is recognized, how it is diagnosed, and what treatment and specialist-care pathways look like.

What PAD Is and Who Is at Higher Risk

PAD refers to arterial disease in the circulation beyond the heart and brain. The legs are the most frequently affected territory, though the arms and other regions can also be involved. The underlying process is usually atherosclerosis, the same plaque buildup that causes coronary artery disease and stroke, which is why PAD is often a marker of broader cardiovascular risk.

Risk is higher in people who:

Smoke or have a history of smoking
Have diabetes
Are older adults
Have high blood pressure or high cholesterol
Have chronic kidney disease
Have a personal or family history of cardiovascular disease

Because these factors overlap with heart and brain disease, PAD is best understood as part of a systemic vascular problem rather than an isolated leg issue.

Symptoms to Recognize

PAD can be silent, especially early on. When symptoms appear, they typically reflect reduced blood flow that worsens with activity and improves with rest.

Common patterns include:

Claudication — cramping, aching, or fatigue in the calf, thigh, or buttock that comes on with walking and eases after a few minutes of rest. This is the classic symptom of PAD.
Rest pain — pain in the foot or toes that occurs at rest, often at night, and may be relieved by hanging the leg down. This suggests more advanced disease.
Non-healing wounds — sores, ulcers, or injuries on the feet or toes that do not heal, or that heal very slowly.
Cool, pale, or shiny skin on the lower leg or foot, sometimes with reduced hair growth or thickened nails.
Weak or absent pulses in the feet, which a clinician may notice on examination.

Symptoms can be atypical, and some people with significant disease report no leg symptoms at all. That is one reason PAD is often underrecognized.

How PAD Is Diagnosed

Diagnosis usually starts with a focused history and physical examination, including checking pulses in the legs and feet and inspecting the skin. From there, the most common first-line test is the ankle-brachial index (ABI).

ABI compares blood pressure at the ankle with blood pressure at the arm. A lower ankle pressure relative to the arm suggests narrowed or blocked arteries in the leg. It is non-invasive, quick, and widely used.
Segmental pressures and pulse volume recordings can localize where the disease is and quantify its severity.
Duplex ultrasound uses sound waves to visualize blood flow and identify areas of narrowing or blockage.
CT angiography (CTA) and MR angiography (MRA) provide detailed images of the arteries and are often used when a procedure is being planned.
Catheter-based angiography is an invasive option typically reserved for when intervention is anticipated.

Referral to a vascular specialist is appropriate when symptoms are limiting, when the diagnosis is uncertain, when wounds are present, or when a procedure may be needed. The Society for Vascular Surgery's patient resources note that finding a specialist with expert training near you is a key step in the care pathway.

Treatment Approaches

Treatment for PAD has two broad goals: reducing cardiovascular risk and improving blood flow to the limbs when symptoms or tissue loss warrant it. These are not mutually exclusive, and most people need both.

Risk-factor control and medical therapy

Smoking cessation is the single most important step for people who smoke. It slows disease progression and reduces cardiovascular events.
Diabetes management, blood pressure control, and cholesterol management address the underlying drivers of atherosclerosis.
Antiplatelet therapy (such as aspirin or another agent) and statins are commonly part of the regimen, depending on the individual.
Supervised exercise therapy is a structured walking program that can improve walking distance and symptoms. It is often recommended before or alongside procedures.

Procedures to restore blood flow

When symptoms are disabling or when there is rest pain or tissue loss, procedures may be considered:

Angioplasty and stenting — a catheter-based approach that opens a narrowed artery, sometimes with a stent to keep it open.
Bypass surgery — a surgical approach that reroutes blood around a blocked segment using a vein or synthetic graft.
Atherectomy and other catheter-based techniques may be used in selected cases.

The choice among these depends on the location and extent of disease, the person's overall health, and the goals of care. A vascular specialist can explain which options fit a given situation.

When to Seek Urgent Care

Most PAD symptoms develop gradually, but some situations require prompt attention:

Sudden, severe pain in a leg or foot
Sudden coldness, pallor, or numbness in a limb
New weakness or paralysis in a limb
A wound or ulcer that is worsening, infected, or not healing
Rest pain that is new or rapidly worsening

These can indicate critical limb ischemia or acute limb ischemia, which are emergencies. The SVS patient resources emphasize that timely specialist care matters for these presentations.

Finding a Specialist

The Society for Vascular Surgery (vascular.org) provides resources for patients and referring providers, including ways to find a specialist with expert training near you. If you have symptoms consistent with PAD, or if you have risk factors and are unsure, a vascular specialist can evaluate blood flow, confirm the diagnosis, and discuss treatment options. The site also offers clinical guidelines and patient education materials that can help you prepare questions before an appointment.