What Is the Trapezius Muscle? Trapezius muscles are large, paired, triangular muscles in the back of your neck and upper back. They extend down your back, but they’re mostly involved in the movements ...

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 ...

What is a Quadriceps Strain? The quadriceps, often shortened and referred to as the quads, are a group of muscles located on the front of the thigh. The quadriceps are actually four different muscles ...

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 ...

A pulled muscle—medically known as a strain—occurs when muscle fibers are stretched too far and sometimes tear. While mild ...

Knee strains involve a tendon or muscle tear around the knee. Symptoms can include cramping, spasms, swelling, and bruising. A knee strain can happen due to twisting, overuse of the muscle, or an ...

Intercostal muscle strain is an injury affecting the muscles between two or more ribs. Symptoms can include sharp, direct pain, stiffness, and mobility difficulties. The intercostal muscles have ...

A pulled muscle — also known as a muscle strain — occurs when a muscle stretches too much, which causes the muscle fibers or tendons to tear. Pulled muscles commonly occur in the lower back or ...

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 ...

Quadriceps are a group of four muscles located at the front of your thigh. Your quadriceps are some of the largest and strongest muscles in your body. Share on Pinterest peterdharwood/Getty Images ...