| http://www.w3.org/ns/prov#value | - Instead, they work with the ribs to keep the back stable and help protect vital organs, such as the heart and lungs.What causes upper and middle back pain?Upper and middle back pain may be caused by:Overuse, muscle strain, or injury to the muscles, ligaments, and discs that support your spine.Poor posture.Pressure on the spinal nerves from certain problems, such as a herniated disc.A fracture of o
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