Compression stockings are designed to provide immediate physiological effects on the circulatory system from the moment they are put on. Mechanically, they apply graduated pressure—tightest at the ankle and decreasing as they move up the leg—which instantly helps to narrow the diameter of distended veins and increases the velocity of blood flow back toward the heart. While the "working" of the compression is instantaneous, the visible reduction of existing edema (swelling) can take several hours of consistent wear to manifest. For many users, the relief from feelings of "heaviness" or aching in the legs is felt within minutes. However, medical professionals emphasize that for long-term management of conditions like chronic venous insufficiency or to prevent deep vein thrombosis (DVT), the stockings must be worn consistently throughout the day. They are most effective when put on first thing in the morning before swelling has a chance to accumulate. While they offer immediate support, they do not "cure" underlying vascular issues instantly; rather, they serve as a persistent mechanical aid that manages symptoms for as long as they are worn.