Build-up of fluid in the body's tissues, often occurring in the lower leg and ankle, is called swelling or edema. Although painless, swelling may be caused by some medications, injury, vein problems, heart problems or other reasons. Prolonged swelling should not be ignored, as it may be a sign of serious disease or chronic venous insufficiency. Some symptoms of edema include rnlarged ankes and calf (lower leg may appear puffy); discomfort or tired legs; decreased mobility (leg may feel heavy); and decreased skin elasticity.
Moderate to severe swelling typically requires a 20-30 mmHg compression for proper treatment and alleviation of the condition. Often a higher compression may be needed to provide the desired relief.