If you intend to use compression socks to soothe aching muscles after an exhausting day, you can go for the lowest level – 8 to 15 mmHg. It should offer relief for tired legs. To support recovery for mild to moderate aches and pains, you can select 15 to 20 mmHg socks. The most common prescribed level is 20 to 30 mmHg as it offers moderate compression, relieving varicose veins, edema, and more. The next level, 30 to 40 mmHg, provides relief from severe edema, deep vein thrombosis, and varicose veins. Socks at this compression level must only be worn under a doctor’s supervision. The same goes for socks with 40 to 50 mmHg, the highest level. Such socks are often used to treat post-thrombotic syndrome and chronic venous insufficiency.