Your armpit, also known as the axilla, contains a large collection of lymph nodes, hair follicles, and sweat glands. A number of things can cause pain in the hollow created by your chest wall, muscles ...

Your diaphragm is a muscle that helps you breathe. When it works in the opposite way that it’s supposed to, it’s called paradoxical breathing. Paradoxical breathing is a sign that you aren’t breathing ...

After undergoing breast cancer surgery, many people experience lasting pain or discomfort in the breast or chest area. This condition, known as postmastectomy pain syndrome (PMPS), is a reality for up ...