What’s causing my mid back pain and spasm?

There are many possible causes of mid back pain and spasm such as overuse, muscle strain, or injury to the muscles, ligaments, and discs that support your spine. Usually, rest will relieve the pain but it is best to consult a doctor in order to know what is actually causing the pain and spasm. Sometimes, the symptoms may be manifestation of an underlying condition such as nerve impingement, and that is what you need to find out.