Many patients will find that sitting for a long time has shoulder pain, the main reasons for this symptom are as follows: 1. It may be due to a long-term fixed posture, resulting in muscle spasm in the shoulder as well as the back. In the process of sitting and standing for a long time, the human body needs to maintain a certain fixed posture, so it will make a group of muscles in a long-term tension, and over time it will cause its spasm, and then induce pain around the shoulder. 2, this situation may be caused by cold. In the process of sitting and standing, the blood circulation in the shoulder will slow down, so if the patient is not dressed enough, it is easy to get cold, which will lead to sterile inflammation and pain. 3. This symptom may also be caused by excessive fatigue. In the process of sitting and standing, the upper limbs may carry out continuous and repeated activities, which may cause excessive fatigue of the muscles and tendons in the shoulder, resulting in fatigue injury and pain. 4. can lead to pain in the shoulder.