Hyaluronic acid injections are sometimes used as a treatment for rotator cuff injuries, especially when there is associated shoulder pain or tendinopathy without a full tear. Hyaluronic acid helps lubricate the shoulder joint, reduce inflammation, and improve cushioning, which can ease pain and support smoother movement. 

Some studies suggest it may provide modest short-term relief, particularly in patients with early or moderate rotator cuff degeneration. However, it does not repair tendon tears and is generally considered when first-line treatments like physical therapy, ice, and NSAIDs have not provided enough relief. Its role is still considered supportive rather than curative.