What does a pulled muscle in the arm feel like?

According to the New York University Langone Medical Center, a muscle strain, also known as a pulled muscle, typically produces pain and soreness when moved. Sometimes twitching occurs in the muscles or a tender, hard knot appears in the area.

NYULMC states that a black and blue mark might be present in a second degree strain along with stiffness and weakness. Third degree strains are those where the muscle has torn, and in such cases, it is sometimes possible to feel the muscle fibers that have bunched up. A more prominent bruising might be present, caused by bleeding within the muscle.