A shoulder can become painful during an ordinary movement, such as reaching into a cupboard, fastening a seat belt, or lifting a bag from the floor. Rest may settle the sharpest symptoms, but it does not always correct the weakness, stiffness, or altered movement that caused the problem.
Returning to the same weights or training schedule can bring the pain back during dressing, sleeping, or reaching overhead.
An assessment is more useful than guessing whether the source is a tendon, muscle, joint, or the neck. The right physio for shoulder injury begins with identifying the movements and demands that matter in daily life.