Pain between the shoulder blades is often due to muscle strain, which may result from lifting heavy objects, poor posture, or overuse. Other health issues can cause upper back pain, though, including acid reflux, disc problems, gall bladder disorders, or even a heart attack. Different disorders will cause different types of pain., Many conditions may cause side pain, ranging from mild to serious. Examples include temporary muscle spasms, injury, and organ conditions. Learn more., Learn what causes chest or back pain with deep breathing, including pain in the left or right side when taking a deep breath., The pain might appear only on one side of the body, or it could be symmetrical on both sides. Psoriatic arthritis may limit your range of motion and leave you tired in the mornings., Pleurisy is inflammation around the lungs, which causes sharp chest pain. It's easy to treat and usually gets better in a few days, but can sometimes be a sign of something more serious, like pneumonia. Symptoms of pleurisy The main symptom of pleurisy is sharp chest pain when you breathe in. The pain may be worse when you cough, sneeze or move around. It may also spread to your shoulders and , There are many potential causes of back pain when breathing. The pain may be caused by an injury to either the bones or muscles in your back. Or the pain can be caused by a condition that affects .