The position of back pain is not fixed, which may be related to back muscle ligament strain, intercostal neuralgia, shoulder and back myofasciitis, etc. The cause of the back pain should be found out and then treated accordingly, and the treatment methods include general treatment, medication, physical therapy, and the treatment of the primary disease. 1. Back muscle ligament strain: commonly found in long-term stooping workers, long time bending low so that the back muscle ligament is in a state of tension and lead to chronic strain. At this time, we should avoid as much as possible to avoid bending low, if necessary, can give anti-inflammatory and analgesic drugs such as diclofenac, celecoxib, etc., or local physical therapy to relieve pain. 2. Intercostal neuralgia: when the pain is severe, it can be radiated to the shoulder and back of the same side, which manifests as back pain and the position is not fixed. Secondary intercostal neuralgia caused by tumor, herpes zoster, thoracic spine tuberculosis and other diseases should be detected and treated in time. Non-steroidal anti-inflammatory drugs such as meloxicam and celecoxib can be given when necessary. For patients with moderate to severe pain, drugs such as codeine and bupropion can be used. 3. Myofasciitis of the back of the shoulder: often due to cold or infection of the back of the shoulder, there are symptoms such as shoulder pain, stiffness, dyskinesia or weakness, etc. At this time, local warmth should be avoided. At this time, the local should keep warm to avoid re-exposure to cold, can be given at the same time ibuprofen, celecoxib and other drugs anti-inflammatory analgesic. Back pain location is not fixed may also have other reasons, it is recommended to go to the hospital in time to improve the examination. Do not blindly use drugs.