Recently, some patients have asked many questions about postoperative complications of cervical lymphatic dissection, among which the more concerned are postoperative shoulder dysfunction and postoperative scar formation. Here we will analyze the causes of shoulder syndrome, which is the most important concern, and summarize the methods of postoperative rehabilitation. Shoulder syndrome occurs due to the injury of the paracervical nerve during cervical surgery. The clinical manifestations of shoulder syndrome are: drooping shoulder, anteromedial shoulder displacement, inability to shrug the shoulder or weakness of shrugging the shoulder, limitation of arm abduction, difficulty in raising the arm, in severe cases, the arm abduction cannot reach the horizontal plane, the upper limb cannot be raised above the head. All cervical lymphatic dissection in our hospital is a modified radical cervical lymphatic dissection, which preserves the integrity of the paramedian nerve and the oblique branch of the cervical plexus nerve. Some patients still have shoulder syndrome after surgery, but the severity of the shoulder syndrome is much less severe than that caused by conventional radical dissection. Why do you still have symptoms despite preserving the integrity of the nerve? The reason is that if the lymph nodes in the IIb area need to be removed during the surgery, the mechanical stimulation of the traction, the electrical stimulation of the electric knife and the thermal stimulation of the ultrasonic knife will damage the paracentral nerve. Although the integrity of the paracentral nerve is clearly preserved, however, the recovery of the nerve takes several months to press, so there will still be a period of shoulder dysfunction after the surgery. What do I need to do when shoulder dysfunction occurs? One is to wait for the natural healing of the nerve, which takes several months, during which time you can take B vitamins that promote nerve recovery; the second is to perform rehabilitation exercises for shoulder function, such as shoulder rotation and impedance exercises. The literature reports that postoperative rehabilitation exercises can significantly improve the recovery of shoulder function. Specific exercises can be found in the following chart.