Medically reviewed by Amy Kwan, PT Your latissimus dorsi (your "lats") is a broad, flat, triangle-shaped muscle that spans ...

Armpit pain is a common ... injuries to the muscles and tendons that insert onto the arm bone," says Lin. These include the pectoralis, or the chest muscles, the latissimus dorsi muscle, which ...

This can lead to muscle strain and pain. Symptoms associated with latissimus dorsi pain from spinal issues can include: Dull, aching pain Muscle spasms Muscle tightness and stiffness Reduced ...