Standing for a long time at work and having swollen feet may be caused by physiological reasons, varicose veins of lower limbs, etc. According to different causes, we can avoid standing for a long time, wear compression stockings, surgery and other ways of treatment. 1. Physiological reasons: Normal people standing for a long time at work will cause obstruction of venous and lymphatic return in lower limbs, which will cause pain and swelling in lower limbs, so they should try to rest and avoid standing for a long time. 2. Varicose veins of the lower limbs: patients with varicose veins of the lower limbs can be aggravated by standing, resulting in pain and swelling of the feet, and should avoid standing or sitting for a long time, wearing compression stockings, or injecting sclerosing agent or surgical ligation of the great saphenous vein or small saphenous vein. There may be many reasons for foot pain and swelling after standing for a long time at work. After excluding the physiological reasons, patients should go to the hospital in time to improve the examination and give targeted treatment in time after clarifying the causes.