Conservative therapy of venous diseases is aimed at improving the condition by means of compression and exercise therapy. Compression hosiery presses the distended veins together so that the venous valves can close again, thus preventing the blood from flowing in the wrong direction - namely, away from the heart. The necessary compression is provided by modern medical compression stockings or tights that prevent new varicose veins from forming and keep existing venous disease under control. Untreated venous disease continues to progress and may become chronic. This is why it is particularly important to prevent deterioration or complications by consistently wearing compression.