How they work
Compression stockings are designed to provide support to the legs and veins, assist with circulation, and minimize swelling. The compression is graduated, with the strongest support starting at the ankles and gradually decreasing towards the top of the garment. This gradual support works in conjunction with the pumping action of the calf muscles, which also assist with circulation.
A common myth is that compression stockings will cut off circulation. When fitted and worn properly, compression stockings help with your circulation, not reduce or restrict it. The sock helps reduce the stretching of the vein walls and allow the valves to close properly and improves overall circulation.
Compression garments are categorized by classes. These classes consist of compression ranges, which are measured in mmHg---meaning millimeters of mercury, the universal form of measurement used for this type of garment. There are designated medical indications for each compression class.