Peripheral Arterial Disease

Key facts

• Peripheral arterial disease (PAD) is narrowing of the arteries that carry blood to the legs and feet, usually from fatty plaque buildup (atherosclerosis).
• The classic symptom is claudication: cramping or aching pain in the calf, thigh, or buttock that appears on walking and eases with rest. Severe disease can cause pain at rest or slow-healing foot sores.
• Antiplatelet medicines such as clopidogrel reduce the risk of clots forming in narrowed arteries and are a standard part of treatment.
• Quitting smoking, controlling blood pressure and blood sugar, and staying physically active all slow disease progression; a doctor can assess whether procedures like angioplasty are needed.

What is happening in PAD

Fatty plaques build up inside the arteries that feed the legs, narrowing them and slowing blood flow. Tissue downstream receives less oxygen than it needs, especially during exercise when demand rises. This is the same atherosclerotic process that affects the heart and brain, so PAD often signals wider cardiovascular risk.

Symptoms

Claudication is the hallmark: cramping, aching, or fatigue in the calf, thigh, or buttock that comes on with walking and fades within minutes of resting. As the disease advances, pain can occur even at rest, and cuts or sores on the feet may heal slowly or not at all because of poor circulation.

How PAD is treated

Reducing clot risk matters because narrowed arteries are prone to sudden blockage. Clopidogrel is one of the most widely used antiplatelet medicines for PAD; it makes platelets less likely to clump together and block already-narrowed vessels. Alongside medication, doctors address the underlying risk factors: blood pressure, cholesterol, and blood sugar control all slow progression. For more advanced blockages, procedures such as angioplasty can restore blood flow directly.

Lifestyle changes that help

Stopping smoking is the single most impactful change, since smoking directly damages artery walls and accelerates narrowing. Regular walking, paced to just short of pain, builds collateral circulation over time. Managing weight, blood pressure, and cholesterol all support the same goal of keeping blood moving to the legs.

When to see a doctor

See a doctor for calf or leg pain that appears reliably with walking. Seek emergency care immediately for a limb that suddenly turns cold, pale, or numb, or loses sensation, since this can mean a complete arterial blockage requiring urgent treatment.

This page is educational and does not replace advice from a doctor or pharmacist who knows your health history.