How effective is cortisone injection for rotator cuff tendinitis?

Rotator cuff tendinitis involves irritation of the tendons that help centre and move the shoulder. Corticosteroid placed near the painful area can settle inflammation and make everyday movement or physiotherapy more tolerable. It does not rebuild tendon tissue or correct repeated overhead loading, poor technique, stiffness, or weakness. The benefit can fade if the shoulder returns to the same workload before it has regained strength and control. A careful examination helps distinguish tendinitis from a tear, frozen shoulder, or neck-related pain.

Discuss a staged plan that may include temporary activity modification, shoulder mobility, and progressive rotator cuff and shoulder-blade exercises. Do not use reduced pain as permission for sudden heavy lifting. Follow post-injection instructions and mention diabetes, medicines, skin infection, or previous steroid reactions. Read [Rotator Cuff Tendinitis](/conditions/rotator-cuff-tendinitis/) and [Cortisone Injection](/treatments/non-surgical-orthopedics/cortisone-injection/).

Seek prompt care for a hot or red injection site, fever, drainage, rapidly worsening pain, or a sudden inability to lift the arm. Arrange review if weakness, tingling, or pain travelling below the elbow appears, or if symptoms fail to improve as expected; the original diagnosis may need reconsideration.

Ask where the injection will be placed, what improvement should occur, and when mobility or strengthening can restart. Ask how your examination distinguishes tendinitis from a tear, what work or sport limits apply, and what the next option is if pain returns.