The common causes of low back pain symptoms in young patients include the following: a. Acute lumbar sprain, young people usually have more sports or activities, which can easily cause acute sprain of the lumbar muscles, resulting in acute injury to the muscle fibers, with inflammatory reactions such as bleeding, congestion and edema, leading to the appearance of low back pain symptoms. Second, chronic lumbar strain, including prolonged bending work or incorrect posture when standing or sitting, resulting in prolonged strain on the lumbar muscles and aseptic inflammation can also produce symptoms of lumbago. Third, less common is lumbar disc herniation, due to the herniated disc compressing the local nerve root can also lead to low back pain. Fourth, other diseases, including diseases of the urinary system, can also produce the corresponding symptoms of low back pain, and patients are advised to go to the hospital for a detailed examination and then a clear diagnosis.