Sitting one day legs and feet swelling, the next morning disappeared because after sitting for a long time will lead to poor blood local circulation, thus causing legs and feet swelling. After a night to get relief, blood circulation circulation, so the next day disappeared. Prolonged sedentary, will lead to a decline in leg muscle strength, blood reflux, mainly due to the contraction of the muscles, this situation blood can not form a good reflux, will cause swelling. If the swelling can subside, generally no treatment is needed, as long as you avoid prolonged sedentary activities, it will soon return to normal. Usually avoid prolonged sedentary, can be appropriate exercise, blood circulation is smooth, there will be no edema. It is recommended to avoid sitting for a long time and standing for a long time, get up and walk around every once in a while, and elevate your legs when resting, which is conducive to the smooth flow of blood. If the swelling continues to be unrelieved or aggravated, it is recommended to go to the hospital in time.