 You know what they say, right? No pain, no gain. But what if it hurts just to walk? It's probably just you getting older, right? Well, it could be peripheral arterial disease, a serious condition often called clogged arteries in the legs. PAD symptoms can include cramping in your legs when you walk, but some people don't feel any symptoms at all. And PAD severely limits blood flow, making it one of the leading causes of foot and leg amputations.