Swelling of the hand after suture is caused by the continued exudation of tissue fluid from the wound. Generally speaking, after a few days of conservative treatment, the edema can subside, but it is also possible that when sewing the wound, the suture is too tight, causing the swelling of the hand. You can use ice on the outside of the hand to effectively reduce edema. At the same time, pay attention to observe the blood supply of the fingertips, if the front of the fingertips blood supply is good, the nails are red, indicating that there is no problem with the blood supply of the fingers. If the front part of the fingertip is bruised, blue, or even black, the sutures are too tight, compressing the blood vessels and affecting the blood supply, and the sutures should be removed immediately to solve the blood supply obstacle caused by the blood vessel compression.