A pulled muscle is an injury to your muscle fibers. Muscle fibers are the large cells that make up your muscles. Your muscles allow you to move when they contract and relax. Many people use the terms ...

Muscle strain is a common injury that occurs when a muscle or tendon is stretched too far or torn due to overuse, sudden movements, heavy lifting, or physical activity. It can affect people of all ...

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 ...

The obliques are the muscles running down either side of the abdomen. Pain in these muscles often occurs due to a type of injury known as “side strain.” There are two sets of oblique muscles: external ...