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Overview

What Is Peripheral Artery Disease?

Peripheral artery disease (PAD) is a condition in which blood flow to the arms or legs is reduced, most often because fatty plaque builds up inside the arteries. This plaque narrows or blocks arteries outside the heart and brain, especially those supplying the legs and feet. Adults with cardiovascular risk factors, such as smoking, diabetes, high blood pressure, or high cholesterol, are most affected. In simple terms, what is peripheral artery disease? It is a form of peripheral arterial disease and vascular disease that can affect both limb health and overall cardiovascular health.

Symptoms

Peripheral Artery Disease Symptoms

Peripheral artery disease symptoms can be mild, absent, or more noticeable during activity. Some people develop discomfort only after walking a certain distance, while others notice changes in their feet or legs. New or worsening symptoms should be assessed rather than attributed only to aging. PAD symptoms may also be less typical, so a clinical evaluation is important when risk factors are present.

  • Leg pain with walking that improves with rest (intermittent claudication)
  • Leg numbness
  • Leg weakness
  • Coldness in a foot or lower leg
  • Skin color change in a foot or leg
  • A slow-healing wound on the foot or leg
  • Erectile dysfunction

SEEK PROMPT CARE

Limb emergency signs

Intermittent claudication usually occurs during activity and improves with rest; pain that occurs at rest may indicate more severe loss of blood flow. Seek urgent medical care for sudden severe limb pain, marked paleness or blue color, or a limb that becomes cold and numb.

Causes

Causes of Peripheral Artery Disease

Atherosclerosis is the main cause of peripheral artery disease. Fatty deposits, cholesterol, and inflammation form plaque in the artery wall, gradually narrowing or blocking arteries that supply the legs and feet. Reduced blood flow can cause exertional symptoms and limit the delivery of oxygen to tissues.

Less common causes

Less common causes include a blood clot, injury to an artery, or inflammation of the blood vessels. PAD is not caused by poor circulation alone; it results from changes in the arteries that restrict blood flow. The same atherosclerotic process may also affect arteries supplying the heart, brain, kidneys, or other organs, which is why peripheral vascular disease is linked with wider cardiovascular risk.

Risk Factors

Risk Factors for Peripheral Artery Disease

Nonmodifiable risk factors

  • Older age
  • A personal history of cardiovascular disease
  • A family history of cardiovascular disease
  • Certain ethnic or genetic factors
  • Cigarette smoking
  • Diabetes
  • High blood pressure
  • High cholesterol
  • Physical inactivity
  • Obesity
  • Chronic kidney disease

The list above includes both fixed risks and modifiable or treatable risks; smoking, diabetes, high blood pressure, high cholesterol, inactivity, obesity, and chronic kidney disease can often be addressed with medical and lifestyle support. Having multiple peripheral artery disease risk factors increases the likelihood of disease. Stopping smoking, controlling blood pressure and cholesterol, managing diabetes, and becoming more active can lower vascular risk.

Complications

Complications of Peripheral Artery Disease

  • Nonhealing wounds
  • Skin or tissue infection
  • Critical limb ischemia
  • Gangrene
  • Amputation
  • Heart attack
  • Stroke

IMPORTANT

Protect your feet and legs

A foot wound, infection, or sudden worsening of circulation requires prompt evaluation. This is especially important for people with diabetes, who may have reduced sensation and a higher risk of serious infection or tissue damage.

Diagnosis

How Peripheral Artery Disease Is Diagnosed

To diagnose peripheral artery disease, clinicians review symptoms and cardiovascular risks, examine the pulses and skin of the legs and feet, and compare blood pressure in the arms and ankles. These steps help show whether blood flow is reduced and whether the skin or tissue has been affected.

  • Ankle-brachial index: Compares blood pressure at the ankle with blood pressure in the arm.
  • Toe-brachial index: Compares toe and arm pressures when an ankle reading may be less reliable.
  • Doppler ultrasound: Uses sound waves to assess blood flow and locate narrowed areas.
  • Exercise testing: Measures symptoms and blood flow changes while walking or exercising.
  • CT angiography: Uses computed tomography and contrast material to create images of blood vessels.
  • MR angiography: Uses magnetic resonance imaging to show blood vessels and possible blockages.
  • Catheter angiography: Uses a catheter and contrast imaging, often when an intervention is being considered.

Test selection depends on symptoms, kidney function, suspected severity, and whether a procedure may be needed. A healthcare professional chooses the safest and most useful combination of tests for each person.

Treatment & Management

Peripheral Artery Disease Treatment and Management

First-line management

  • Antiplatelet medicines: Help reduce the chance of blood clots and cardiovascular events when prescribed.
  • Statins: Lower cholesterol and help stabilize plaque.
  • Blood-pressure medicines: Control high blood pressure and reduce strain on blood vessels.
  • Diabetes medicines: Help control blood glucose and lower vascular complications.
  • Walking-related medicines: Selected medicines may improve walking symptoms for some people.

Procedures to improve blood flow

Prevention

Preventing Peripheral Artery Disease

  • Avoid tobacco to reduce damage to blood vessels.
  • Exercise regularly, following a plan that is safe for your health.
  • Eat a heart-healthy diet with guidance from a healthcare professional when needed.
  • Maintain a healthy weight.
  • Control diabetes and follow the agreed treatment plan.
  • Manage blood pressure.
  • Manage cholesterol.
  • Attend recommended medical visits and monitoring appointments.

There is no routine population screening test for everyone. However, people with symptoms or substantial risk factors may need targeted evaluation for peripheral artery disease and related cardiovascular problems.

Outlook and Prognosis

Outlook and Prognosis for Peripheral Artery Disease

Peripheral artery disease is usually a long-term condition rather than something that permanently cures itself. Even so, walking ability and symptoms can improve with treatment, exercise therapy, and control of vascular risk factors. Ongoing care can also reduce the risk of complications affecting the limbs, heart, and brain.

SUPPORTS IMPROVEMENT

Taking medicines as prescribed, participating in exercise therapy, stopping tobacco use, and attending monitoring visits can support better walking ability and long-term vascular health.

RAISES CONCERN

Worsening pain at rest, wounds, infection, tissue loss, continued smoking, uncontrolled diabetes, and severe circulation loss can signal progression and require prompt medical attention.

Continued follow-up is important for cardiovascular risk reduction and for checking symptoms over time. Promptly report new leg or foot changes, including color changes, wounds, increasing pain, or loss of sensation.

When Should You See a Doctor

When Should You See a Doctor for Peripheral Artery Disease?

  • Recurring leg pain with walking
  • Numbness or weakness in a leg or foot
  • Changes in foot color or temperature
  • A slow-healing wound
  • Multiple risk factors for peripheral artery disease

GET URGENT MEDICAL HELP

Sudden limb changes can be an emergency

Seek emergency help for sudden severe leg pain, a cold or pale or blue limb, sudden numbness or weakness, loss of a pulse, a rapidly spreading infection, or signs of tissue death. These changes may indicate a limb-threatening loss of blood flow and should not wait for a routine appointment.

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