A direct blow to the rib cage: such as falling, car accident, or trauma from contact sports such as football, hockey. In which the intercostal muscles will. The symptoms of intercostal muscle strain may vary slightly, depending on how the injury occurred, and may include: Sudden, severe upper back/rib pain. Intercostal muscles, located on the side of each rib cage, can be overstretched or torn during athletic events or hard labor, causing intense pain in the.
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