Flexi Says: Peripheral artery disease (PAD) is a narrowing of the arteries other than those that supply the heart or brain, due to atherosclerosis. The figure below shows how PAD occurs. 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). Up to half of all cases of PAD, however, do not have any symptoms.