Final answer:
Peripheral artery disease (PAD) is the narrowing of arteries due to atherosclerosis, typically causing leg pain when walking. Other symptoms can include skin ulcers, bluish skin, cold skin, and poor nail and hair growth in the affected leg(s).
Step-by-step explanation:
Peripheral artery disease (PAD) is the narrowing of the arteries other than those that supply the heart or brain due to atherosclerosis. PAD most commonly affects the legs, but other arteries may also be involved. The classic symptom is leg pain when walking, which usually resolves with rest. This symptom is known as intermittent claudication. Other symptoms may include skin ulcers, bluish skin, cold skin, or poor nail and hair growth in the affected leg(s). However, up to half of all cases of PAD do not have any symptoms.