Peripheral Artery Disease is a widespread circulatory disorder that primarily affects the lower limbs, although it can also occur in the arms. In PAD, plaque gradually narrows the arteries, restricting blood flow to muscles and tissues. As a result, the affected limbs may not receive enough oxygen and nutrients, especially during physical activity when the body's demand for blood increases.
One of the most common symptoms of PAD is intermittent claudication. This condition causes pain, cramping, aching, or fatigue in the calves, thighs, hips, or buttocks during activities such as walking, climbing stairs, or exercising. The discomfort typically subsides after a few minutes of rest. Similar symptoms can occur in the arms, causing aching, cramping, or heaviness during activities such as lifting, carrying objects, knitting, or writing.
In addition to pain during activity, PAD can produce several other warning signs. Individuals may experience coldness in the lower leg or foot compared to the opposite side, leg numbness or weakness, and weak or absent pulses in the feet. Changes in the skin and tissues are also common. These may include slow-healing wounds or sores on the feet and toes, hair loss on the legs, shiny skin, and skin that appears pale, bluish, or unusually cool. In severe cases, poor circulation can lead to tissue damage, ulcers, and even limb-threatening complications.
The primary cause of PAD is atherosclerosis. Several risk factors contribute to plaque formation and artery damage. Smoking is one of the strongest risk factors because it damages the inner lining of blood vessels and promotes plaque buildup. Diabetes increases the risk by damaging blood vessels and accelerating atherosclerosis. High blood pressure can injure artery walls over time, while elevated cholesterol levels contribute directly to plaque formation. Other important risk factors include older age, obesity, physical inactivity, chronic kidney disease, and a personal or family history of heart or vascular disease.
The development of atherosclerosis usually occurs slowly over many years. Damage to the artery's inner lining, known as the endothelium, triggers inflammation and allows cholesterol and other materials to accumulate within the vessel wall. Over time, plaques enlarge and reduce blood flow. In some cases, plaques can rupture, causing blood clots that may suddenly block an artery.
PAD is more than just a circulation problem affecting the limbs. Because atherosclerosis often occurs throughout the body, individuals with PAD have a significantly higher risk of serious cardiovascular events such as heart attacks and strokes. Early diagnosis, lifestyle changes, regular exercise, smoking cessation, and proper management of diabetes, blood pressure, and cholesterol are essential for preventing complications and maintaining healthy blood flow.
Atherosclerosis in the Arteries of the Arms and Legs
