People with certain leg problems or at risk for blood clots in the legs, known as deep vein thrombosis (DVT) must wear compression garments. These clots can also develop as a result of prolonged bed rest (such as after surgery), sitting for long periods (such as on a plane, at work, etc.), use of birth control pills or hormone replacement therapy, pregnancy, family history of DVT, inflammatory bowel disease, and certain genetic clotting disorders. Other groups that can benefit from wearing compression stockings include people with varicose veins, venous leg ulcers, or leg swelling (edema), as well as those with circulatory problems. People who spend a lot of time on their feet will find that the stockings improve comfort. They’re also popular among some athletes, such as runners and basketball players.