The most common cause of swollen feet after prolonged standing is local lymphatic reflux obstruction or obstruction of lymphatic flow in the lower limbs, resulting in swelling, pain and discomfort. For simple obstruction of lymphatic return or lymphatic flow in the lower extremities, bed rest, elevation of the affected limbs, and oral medication to promote lymphatic return, such as Myclobutanil or Diosmin tablets, will usually provide significant relief in about 12-24 hours, and even the swelling of the lower extremities will disappear. Patients with hypercoagulability, such as those with high blood lipids, slow hemodynamics or elevated D-dimer, should be alerted to the fact that prolonged standing may also lead to lower extremity DVT formation and subsequent swelling of the lower extremity. For patients with definite lower extremity DVT, further filter placement or even thrombolysis is usually required to achieve a cure.