High shoulders and low shoulders can be caused by uneven stress on the shoulders and scoliosis. 1. Improper posture for a long time: If one shoulder is overloaded or keeps a crooked shoulder posture for a long time, it may cause an imbalance in the muscle strength of the neck, shoulder and back muscles, and the phenomenon of one shoulder being high and one shoulder being low may occur. 2. Scoliosis: Scoliosis can lead to asymmetry between the two sides of the back, and the symptoms of high shoulders and low shoulders can occur. It is recommended that people with high shoulders and low shoulders should go to regular hospitals for consultation in time to clarify the causes, and if treatment is needed, standardized treatment should be carried out under the guidance of doctors to avoid adverse effects on the body due to delayed conditions.