Swelling of the feet after delivery needs to be analyzed according to different situations. If the swelling of the feet after delivery is accompanied by swelling of the feet before delivery, it may be due to kidney damage caused by the delivery, and there is an increase of protein in the urine or blood pressure, which is called hypertensive syndrome of pregnancy. After delivery, the swelling gradually decreases, the protein in the urine disappears, and the blood pressure decreases. At this time, even though there is edema in the feet after delivery, the edema becomes lighter and lighter as time goes on. In addition, the swelling of the feet after delivery has nothing to do with the pre-delivery period. It may be due to kidney damage caused by childbirth or changes in hormone levels, which require careful differential diagnosis to facilitate treatment of the disease.