Postoperative precautions: 1. Within 48 hours after surgery, the shoulder joint should be in the inward position, avoid abduction of the upper arm, and feasible finger extension and fist clenching movements. When getting out of bed, apply a sling to support the affected limb, and others can only support the healthy side to avoid sliding of the axillary flap and affecting the healing. 2. Timely and accurate functional exercise is an important guarantee for the recovery of upper limb function. Exercise should not only prevent the movement from being too big and violent to affect the wound healing, but also pay attention to the movement not being too small so as not to affect the training effect. It is better to design an exercise schedule, record the daily exercise, and gradually increase the exercise action and activity. 3.According to the situation, actively develop a functional exercise plan after discharge from the hospital. Do not measure blood pressure, draw blood, give intravenous injection or lift heavy objects with the affected limb, and the weight-bearing of the affected limb should not exceed 5 kg, so as not to affect the recovery of the function of the affected limb. Breast cancer patients should actively take functional exercises after surgery in order to enhance the effect of breast cancer surgery, promote the recovery of organism function and prevent deformity. Some simple functional exercise methods: 1. 3 days after surgery, practice finger extension, fist clenching, wrist flexion and elbow flexion exercises. 2.3～4 days after surgery, practice sitting elbow flexion movement. 3.5～8 days after surgery, practice hand touching the contralateral shoulder and ipsilateral ear. 4.9～10 days after surgery, practice straightening, elevation and inversion and flexion of the upper limb on the affected side. Raise the shoulder joint to 90 degrees and reach the level of flat shoulder. 5.14 days after surgery, practice shoulder joint, place hands behind the neck, and practice from low head position to head and chest up position. Further, practice hand beyond the top of the head, feel the opposite ear, and start practicing hand-held wall lift until discharge. 6.After discharge, continue to practice hand-held wall raises and gradually do forward, backward, rotational movements and appropriate back extension and load exercises with the shoulder joint as the center