Back pain can be caused by neck sprain, lumbar muscle strain, intercostal neuritis, trauma and so on. 1. Neck sprain: If the cervical spine movement is incorrect or the sleeping posture is incorrect, it can lead to neck sprain, which will cause the back muscles to be tense, and back pain will occur. 2. Lumbar muscle strain: Lumbar pain can also be caused by lumbar muscle strain, which is related to cold or external pressure, resulting in stiffness, discomfort, pain and other symptoms. 3. Intercostal neuritis: Back pain may be caused by intercostal neuritis. When the inflammation is stimulated, back pain occurs, and the pain is distributed in a half ring from back to front. 4. Trauma: the back suffers direct or indirect impact, resulting in spinal fractures, then the back pain will occur. Or long-term fatigue, improper exercise and other factors may lead to muscle injury, this will also appear back pain. It is recommended that when this symptom occurs, you should pay attention to rest, pay attention to keep warm, and avoid the body from getting cold. If the symptoms are not relieved for a long time, you should go to the hospital for examination and treatment.