Chest Pain Left Side Into Back. Under the left side of your rib cage are your heart your left kidney left lung and spleen. When a spinal nerve in the thoracic spine upper back becomes compressed or inflamed such as by a bone spur abnormal bone growth or thoracic herniated disc pain may travel along the nerve from the upper back to the chest.
Pain under your left rib cage can occur anywhere in your upper chest upper abdomen or the left side of your upper back. Because left sided pain in your upper back or chest can be heart related you should never ignore that type of pain. According to doctors from the mayo clinic some of the symptoms of pain under your left ribs can be any of the following.
Under the left side of your rib cage are your heart your left kidney left lung and spleen.
It is true that the back pain is not as serious as that of the chest pain. Similarly degeneration within the costovertebral joint where the rib meets the thoracic spine could pinch an intercostal nerve and cause pain along the rib. This type of pain may come and go over a period of time or it can last for a few minutes. The cardiac pain happens when not enough oxygen rich blood gets to your heart.