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 ...

A calf strain is an injury to the muscles of the back of the lower leg. These injuries are most often caused by minor tears of muscle fibers. Usually, the bulk of the muscle tissue remains intact.

This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. A muscle strain, or a pulled muscle, is among the most common injuries affecting people of all ages, particularly those engaging in ...

Myalgia often results from muscle strain, injury, or overuse. Chronic conditions like fibromyalgia may require treatment to ease myalgia. Using stress management techniques, like journaling, ...

Groin strains cause muscle damage or tears that lead to pain, limited mobility, weakness, and swelling. Resting and icing the injury helps with recovery, but severe cases might need therapy or surgery ...

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 ...

Concurrent pain in your buttocks and the back of an upper thigh points to some specific underlying conditions. Pain in your buttocks or the backs of your upper thighs may be from injuries or muscle ...

Muscle pain that does not go away after several days or is accompanied by symptoms such as fever, shortness of breath, and extreme weakness requires medical assistance. Muscle pain, also called ...

Rhomboid muscle pain occurs between the shoulder blades and spine. It may feel like tenderness around the shoulder blade. Risk factors for rhomboid muscle pain include injury and general overuse. The ...