Sharp stabbing pain under left shoulder blade. doesnt always hurt when i make some movements, but does hurt when taking deep breaths, coughing, sne...

Pleuritic chest pain: Sharp pain with taking a deep breath, coughing or sneezing but not with movement of the arms is often caused by inflammation of the lining of the chest wall cavity or pleura. There are many causes, but viral URI and pneumonia are common, but pneumothorax and pulmonary embolism are possible. If fever, shortness of breath or labored breathing, see doctor urgently for Dx. If mild, ibuprofen is ok.