Do You Need Subacromial Decompression After a Cortisone Injection?

A cortisone injection places anti-inflammatory medicine near a painful shoulder structure and may provide temporary symptom relief. Subacromial decompression is a surgical procedure intended to change the space beneath the acromion. Relief, lack of relief or brief improvement after an injection does not by itself prove that surgery is needed. Your clinician also considers the examination, shoulder movement, strength, diagnosis and response to rehabilitation.

Write down how your shoulder changed after the injection, including the timing, duration and activities affected. Return for review if pain continues or function remains limited. Ask whether physiotherapy, posture and load changes, or a different diagnosis should be explored. If surgery is raised, discuss its purpose, alternatives, expected recovery, and how the decision relates to your specific findings rather than to the injection result alone.

Contact your clinician promptly for increasing redness, warmth, drainage or fever after an injection, or pain that is rapidly worsening. Get urgent help for sudden major weakness, a deformed shoulder, severe injury, chest pain or difficulty breathing.

What is the most likely source of my shoulder pain? How did the injection response affect the assessment? What non-surgical options remain? What would decompression change, and what rehabilitation would follow?