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.
Weâve all had throbbing leg pain at some point in our life. As a young adult, this throbbing leg pain is typically caused by some athletic event or injury. But as we get older, there are other considerations that can be a bit more serious.
1 There are two systems of veins in the leg: superficial and deep. 2  If a blood clot occurs in a deep vein (deep venous thrombosis), it causes a damming effect, and blood is trapped behind the blockage. 3  This causes redness, swelling, warmth, and pain in the affected area.4  Calf pain and swelling are common symptoms. Veins return blood from the legs to the heart. 2  There are two systems of veins in the leg: superficial and deep. 3  If a blood clot occurs in a deep vein (deep venous thrombosis), it causes a damming effect, and blood is trapped behind the blockage. 4  This causes redness, swelling, warmth, and pain in the affected area.