What does a pulled muscle under armpit feel like?

A pulled muscle under the armpit typically causes sharp or aching pain in the area, which may worsen with movement, especially when raising the arm or twisting the torso. You might also experience tenderness, swelling, or a feeling of tightness in the surrounding muscles. Additionally, there could be limited range of motion and discomfort during everyday activities. If the pain persists, it's advisable to seek medical attention.