Compression stockings are worn for comfort, to improve athletic performance, and to help prevent significant medical issues. In a nutshell, they increase blood flow. They can help with leg pain and swelling. They can also help you avoid deep vein thrombosis (DVT), a type of blood clot, and other circulatory issues. They come in a variety of sizes and strengths, so you and your doctor must decide which one is ideal for you.

What Are They, Exactly?
Compression stockings are a type of sock that is meant to wrap snugly around your leg and gently squeeze it. Graduated compression or pressure stockings start tight at your ankle and loosen up your leg. Compression sleeves are simply the tube portion of the garment without the foot. They’re available over-the-counter, but if your doctor prescribes them, your insurance might cover the cost.

Who Makes Use of Them?

• People who have or are at risk for circulatory issues such as DVT, varicose veins, or diabetes.
• People who have recently had surgery.
• Those who are unable to leave their beds or have difficulty moving their legs.
• People who spend their days at work standing.
• Athletes.
• Women who are pregnant.
• People who spend a lot of time aboard planes, such as pilots.

What exactly do they do?
The pressure that these stockings apply to your legs aids in the proper functioning of your blood vessels. Blood can flow freely because the arteries that carry oxygen-rich blood to your muscles can relax. The veins receive a boost, allowing blood to flow back to the heart.

Sources: Webmd