Whether it is a complete or incomplete severance, a series of postoperative complications such as joint stiffness, muscle atrophy and sensory impairment are likely to occur to different degrees. Therefore, on the basis of successful surgery, it is important to do a good job of postoperative functional exercise for the replanted finger to establish the collateral circulation as soon as possible, which is conducive to the decreasing edema and sensory recovery of the replanted finger, helping the patient to recover the ability of self-care and improve the quality of life to the greatest extent. Principles of functional exercise after finger reimplantation The main skill of rehabilitation therapy is to master the strength of activities. In the early stage, passive activities should be gentle and soothing, so as not to cause intolerable pain, and to prevent and control tendon adhesions and joint stiffness. In the active rehabilitation exercise stage, patients are instructed to perform resistance training in a gradual manner to enhance muscle strength and endurance. Physiotherapy is performed before exercise to promote blood circulation and increase the joint and muscle distraction effect. Methods of functional exercise after finger reimplantation 1. From the 5th day after finger reimplantation, instruct patients to actively exercise the affected wrist joint, the interphalangeal joint and metacarpophalangeal joint of the healthy finger for 3 hours daily. 2.On the 14th day after the operation, the affected finger should do the exercise of lifting or holding the sandbag with the cooperation of the healthy finger, and the weight of the sandbag should be 50-100g. 3.48 hours after the removal of the kyphosis needle, under the guidance of the rehabilitation therapist, the active and passive movements of the interphalangeal and metacarpophalangeal joints of the affected finger, the speed of passive movements should be slow, gradually increase the force, when the limit angle is reached, hold for 10-20 minutes, then slowly reduce the external force, and so on repeated extension and flexion. 4.Passive exercise amplitude from small to large, daily or weekly increments. The active exercises of the affected fingers include activities of the metacarpal and interphalangeal joints in all directions, as well as palm, finger, fist grasping and fist releasing. Auxiliary training of finger strength using tools such as leather stencils, screws and nuts for 6 hours daily. 5.On the 90th day after surgery, focus on training the flexibility, coordination and precision of the affected finger movements, such as shooting, throwing, catching, throwing rings, using spoons, chopsticks, writing and combing hair, etc., and train the ability of both hands to operate together, such as tying and untying knots, typing and playing the piano, etc., for 4 hours a day. I hope that you will pay more attention to it. I hope that patients should go to the regular hospital for treatment at the first time after the broken finger occurs, and should not handle their fingers privately to avoid infection.