Why does my shoulder hurt when I lift my arm?
Pain when lifting your arm is commonly associated with the rotator cuff tendons and surrounding structures, often described as rotator cuff-related shoulder pain or subacromial pain.
It can be particularly noticeable when reaching overhead or lifting the arm away from the body, and may develop after increasing training, repetitive overhead work or a change in activity. Rather than something simply being “trapped” or “pinched”, shoulder pain is usually influenced by a combination of how much load the shoulder is currently tolerating, muscle capacity and sensitivity of the tissues.
Most cases don't indicate serious damage and can improve with appropriate exercise, load management and rehabilitation. If your pain started after a significant injury, you suddenly can't lift your arm, or you've developed marked weakness or severe worsening pain, it's worth getting assessed promptly.