Every time i take a deep breath in i have a sharp pain on my mid right side of my back and in my chest. ?

Pleurisy: Pleurisy (also known as pleuritis) is an inflammation of the pleura, the lining of the pleural cavity surrounding the lungs. Among other things, infections are the most common cause of pleurisy. The inflamed pleural layers rub against each other every time the lungs expand to breathe in air. This can cause severe sharp pain with inhalation (also called pleuritic chest pain).