Most of the edema that occurs when the saphenous vein is taken for vascular grafting by bypass surgery can be completely subsided in 5~7 days, the exact time is related to the recovery condition of the body. Bypass surgery is mainly used for coronary heart disease that cannot be treated by stent surgery. By taking the saphenous vein for vascular grafting, it will cause edema of the soft tissues around the thighs, which belongs to the surgical cleaning wounds, and the general recovery is relatively fast. Most of the people can completely subside in 5~7 days, good physical condition, the general recovery time will be shortened, must avoid infection. During the recovery period, avoid excessive contact with water around the wound, once redness, swelling, increased secretion, you need to consult a doctor in time to observe and diagnose the condition under the guidance of the clinician to carry out standardized treatment, to avoid delays in the condition.