Leg swelling or Arm Swelling
Blood clots that travel from deep veins of the legs, and rarely from the arms, can cause swelling in both the upper and lower extremities. Blood clots causing pulmonary embolism can also cause damage to blood valves. The persistent blockage of the veins of the arms and legs may cause noticeable inflammation. Damage to blood vessel valves can lead to leakage in the wrong direction, causing fluid retention and pressure. Fluid retention can cause swelling in the arms, legs and ankles of people with pulmonary embolism.
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