Former British Prime Minister Margaret Thatcher pauses at the casket of former President Ronald Reagan as he lies in state in the Capitol Rotunda on June 9, 2004, on Capitol Hill in Washington.
Yes, perhaps many of the causes are not severe, but there are conditions that should cause concern and require immediate consultation with a physician. Throbbing leg pain could be caused by sciatica. The sciatic nerve is the longest of all the nerves in our body. This nerve originates from the lower back and proceeds all the way down to the thighs of each leg and to the feet. The sciatic nerve supplies sensation to the leg.
1 Pain in the legs may be due to injury or inflammation of any of the structures that are found in the leg, including bones, joints, muscles, tendons, ligaments, blood vessels, nerves, and skin. Inflammation of tissue is usually the cause of pain.  Pain can also radiate from other parts of the body and be felt in the leg. Back ailments can cause pain and numbness of the leg. Abdominal aorta and iliac artery aneurysms can also present with leg pain. A blood clot in the large veins located in the abdomen, pelvis, or legs is another cause of leg symptoms.