A steroid injection for subacromial bursitis involves injecting a corticosteroid medication directly into the subacromial bursa to reduce inflammation and relieve pain. This treatment can help decrease swelling, improve mobility, and alleviate discomfort associated with bursitis, especially when other conservative treatments (like rest or physical therapy) have not been effective. The effects can last from weeks to months, providing significant relief for shoulder function. #shoulderpain #PainMa