Peripheral Artery Disease: 6 Risk Factors You Can Control

• 20 November 2018
• Dr. Obinna Nwobi

Peripheral artery disease (PAD) is caused by plaque buildup (atherosclerosis) in the arteries that carry blood to your legs. Six of its strongest risk factors are things you can change: smoking, diabetes, high blood pressure, high cholesterol, excess weight, and physical inactivity. Age, family history, and race also raise risk and cannot be changed — which makes the controllable factors more important, not less. Quitting tobacco and starting a structured walking program are the two highest-impact steps, and both are Class 1 recommendations in the 2024 ACC/AHA PAD guideline. If you have leg pain when you walk, a nonhealing foot sore, or risk factors and no symptoms at all, a simple ankle-brachial index (ABI) test can tell you where you stand.

What PAD Is, in Plain Terms

PAD develops when plaque — a mix of fat, cholesterol, fibrous tissue, and calcium — builds up on the inner lining of the arteries feeding your legs and feet. As those arteries narrow, muscle and skin downstream get less oxygen-rich blood. The same disease process usually affects arteries elsewhere, which is why PAD also raises your risk of heart attack and stroke. (Source: NHLBI, “Peripheral Artery Disease — Causes and Risk Factors.”)

Roughly 6.5 million people age 40 and older in the United States have PAD, and prevalence rises steadily with age (CDC). NHLBI puts the figure at more than 8 million adults age 40+; both agencies agree PAD is common and under-recognized.

PAD is often silent. The classic symptom is leg pain with walking that eases with rest (claudication) — but up to 4 in 10 people with PAD have no leg pain at all (CDC). That is the single most important reason to act on risk factors rather than wait for symptoms.

Symptoms Worth Reporting to a Doctor

• Pain, cramping, or aching in the buttock, hip, thigh, or calf brought on by walking and relieved by rest
• Leg heaviness, fatigue, or weakness with activity
• Numbness or tingling in the feet or toes
• One foot or leg that feels cooler, or looks pale or discolored
• Sores or cuts on the feet or toes that heal slowly or not at all
• Loss of hair on the lower legs; toenail changes
• Leg or foot pain at rest or at night

⚠️ Emergency guidance: Sudden, severe leg pain with a cold, numb, pale, or bluish foot can indicate acute limb ischemia — a medical emergency. Call 911 or go to the nearest emergency department immediately; do not wait for an office appointment. A rapidly worsening foot wound, spreading redness, black tissue, or fever also needs same-day urgent care.

The 6 Risk Factors You Can Control

1. Smoking and all tobacco use

Tobacco is the most powerful modifiable risk factor for PAD. Chemicals in smoke injure the lining of blood vessels, drive inflammation, raise blood pressure, and worsen cholesterol. In a nationally representative U.S. analysis, current smoking carried roughly a 4-fold higher odds of PAD (NHANES, Circulation 2004). Smoking also makes existing PAD symptoms worse (CDC).

The 2024 ACC/AHA PAD guideline is unusually direct here (Class 1, Level A): people with PAD who use tobacco should be advised at every visit to quit, and should be helped to build a quit plan combining medication (varenicline, bupropion, and/or nicotine replacement) with counseling or a cessation program. Avoiding secondhand smoke indoors is also recommended.

What to do: ask your physician for a combined medication-plus-counseling plan rather than willpower alone. Free help: 1-800-QUIT-NOW.

2. Diabetes

High blood sugar damages arteries and accelerates atherosclerosis, and diabetes is listed by CDC among the core PAD risk factors. People with both diabetes and PAD face higher risk of nonhealing wounds and limb loss, which is why daily foot checks and prompt attention to any sore matter so much. Diabetes management is part of the guideline-recommended medical therapy package for PAD.

What to do: know your A1c, agree on a target with your physician, and inspect your feet daily.

3. High blood pressure

Hypertension is a recognized PAD risk factor (CDC, NHLBI), and antihypertensive therapy is part of standard risk-factor management in the 2024 guideline. Home monitoring makes this concrete — bring your readings to appointments.

4. High cholesterol

Cholesterol is the raw material of plaque. The 2024 guideline recommends high-intensity statin therapy as part of medical management for patients with PAD. Statin decisions are individual — this is a conversation with your physician, not a self-treatment step.

5. Excess weight

Excess weight travels with the other five factors — higher blood pressure, unfavorable cholesterol, and insulin resistance — and it makes walking harder, which reinforces inactivity. We cover this in depth in our article on the link between obesity and PAD.

6. Physical inactivity — and the exercise that actually treats PAD

This is the most underused treatment in PAD care. In the 2024 ACC/AHA guideline, supervised exercise therapy (SET) is a Class 1 recommendation to improve walking distance, function, and quality of life in chronic symptomatic PAD, and structured community-based or home-based walking programs are also effective. For patients with functionally limiting claudication, structured exercise should be offered as an initial treatment option.

What a guideline-described SET program looks like: intermittent treadmill walking to moderate claudication discomfort alternating with rest, at least 3 sessions per week for a minimum of 12 weeks, 30–45 minutes of active walking per session, in a supervised setting.

What you cannot change — but should still know

Age (most Americans with PAD are 65 or older), family history and genetics, and race — Black adults have a higher risk of PAD even after accounting for conventional risk factors, per both CDC and the 2024 guideline. These factors do not doom you; they change the threshold for getting tested.

How PAD Is Diagnosed

If your history or leg exam suggests PAD, the guideline calls for prompt evaluation with the ankle-brachial index (ABI) — a painless comparison of blood pressure at your ankle and your arm — to establish the diagnosis.

Who should ask about testing even without symptoms? People with PAD risk factors — especially tobacco use, diabetes, or age over 60 — should raise the question with a clinician, since PAD is frequently silent (CDC; NHLBI).

Putting It Together: A Realistic 90-Day Plan

1. Week 1 — Book an evaluation if you have leg symptoms or two or more risk factors. Write down your current blood pressure, A1c, and cholesterol numbers.
2. Week 1–2 — If you use tobacco, start a combined medication + counseling quit plan.
3. Week 2–12 — Begin a structured walking program as directed by your physician: walk until discomfort is moderate, rest, repeat, most days of the week.
4. Ongoing — Daily foot inspection, especially with diabetes. Report any new sore immediately.
5. Month 3 — Recheck blood pressure, weight, and walking distance with your care team, and adjust.

This plan is general education, not a personal treatment prescription. Exercise plans for people with leg or heart symptoms should be cleared by a physician first.

FAQs

What causes peripheral artery disease? Atherosclerosis — plaque buildup made of fat, cholesterol, fibrous tissue, and calcium — narrows the arteries that carry blood to the legs and feet, reducing blood flow (NHLBI, CDC).

What are the PAD risk factors I can control? Smoking and other tobacco use, diabetes, high blood pressure, high cholesterol, excess weight, and physical inactivity.

Which PAD risk factors can’t be changed? Age, family history and genetics, and race and ethnicity. Black adults have a higher risk of PAD even after adjusting for conventional risk factors.

Can PAD be prevented or slowed? Risk-factor control is the foundation of PAD care. Quitting tobacco, managing diabetes, blood pressure, and cholesterol, and following a structured exercise program are all guideline-recommended and can improve symptoms and walking ability (2024 ACC/AHA PAD guideline).

Does PAD always cause leg pain? No. Up to 4 in 10 people with PAD have no leg pain, and only about 1 in 4 experience the classic walk-pain-rest pattern (CDC; NHLBI). Silent PAD still raises cardiovascular risk.

How is PAD diagnosed? Usually with the ankle-brachial index (ABI), a painless blood-pressure comparison between ankle and arm, sometimes followed by ultrasound or other imaging.

Does walking help or hurt PAD? Structured walking programs improve walking distance and quality of life and are recommended as an initial treatment for limiting claudication — but the program should be designed with your physician, and sudden or resting leg pain needs evaluation first.

When is leg pain an emergency? Sudden severe leg pain with a cold, numb, pale, or bluish foot may be acute limb ischemia — call 911.