How to do about swollen legs standing for a long time, it is necessary to find out what is the cause of swollen legs. Common causes may be caused by venous reflux disorders in the lower extremities, at which point it is recommended to go to the hospital for a venous ultrasound of the lower extremities to check if the venous valves are functioning well. If it is a lower limb vein problem, such as venous valve dysfunction or varicose veins in the lower limb, it is recommended to use elastic stockings, which can promote the return of blood to the legs and relieve edema, or you can also take some medications, such as Myzlin, which can also improve the function of the veins. Of course, there is another condition that leads to leg swelling is nephrogenic, chronic nephritis or nephropathy can lead to leg swelling, it is recommended to go to the hospital to check the urine to see if there is protein, if it is nephrogenic, it will be treated as nephritis or nephropathy. There is another condition, heart disease because of heart failure will also lead to leg swelling of the lower extremities, long-term standing leg swelling will be more serious, this time also according to heart failure to treat, the specific treatment depends on the situation, different diseases, different situations, the treatment is different.