Pancoast tumors, a form of lung cancer, grow near the upper part of the lungs and can invade tissues near the shoulder. Pancoast tumors often cause pain in the shoulder that radiates down the arm. Due ...
Usually, it gets better fairly quickly and causes no long-term problems. However, some people develop a rare problem called shoulder injury related to vaccine administration (SIRVA). This article will ...
A hiatal hernia – a rarer cause of pain under your left breast—is when your upper stomach bulges through the diaphragm, which separates your abdomen and chest, per Mayo Clinic. The painful sensation ...