There are dozens of causes of leg pain, many of which have nothing to with arteries – causes such as arthritis, spinal stenosis, or sciatica. In other cases, PAD patients may have no symptoms at all. Studies of the arteries can start with simple tests to measure blood flow into your legs and feet, studies such as ultrasound, special blood pressure readings, and treadmill testing. Even if you have no symptoms, screening of the arteries may detect early stages of PAD.