Pain on raising the arm often comes from the rotator cuff, subacromial irritation, stiffness of the capsule, or referred pain from the neck. Sudden pain after a fall needs earlier review.
A familiar pattern
You reach for a cupboard, hang clothes, or press overhead and a sharp catch appears. Night pain on that side often follows. This pattern is common and usually treatable once the driver is clear.
Possible causes
Tendon irritation, early cuff tears, stiffness, and acromioclavicular joint pain can all limit elevation. The neck can also send pain to the shoulder.
When to seek care
See a doctor if you cannot lift the arm, pain followed a fall, night pain is regular, or symptoms last more than two weeks.
Treatment overview
Most people start with examination and physiotherapy. Injections are used selectively. Arthroscopy is reserved for structural problems that do not respond.