How common is shoulder pain in AC joint injury?

An AC joint injury can make it painful to lift the arm, reach across the body, put on clothing, or lie on the affected side. Tenderness and swelling may sit directly over the joint, and a visible change in shoulder contour can occur with a more substantial injury. Pain may also come from other shoulder structures, so the event, exact location, range of movement, and strength are useful parts of an examination.

Rest from contact, overhead, and heavy lifting that increases pain. Support the arm briefly if advised, but keep comfortable elbow, wrist, and hand movement to avoid unnecessary stiffness. Cold packs wrapped in cloth may ease soreness for short periods. A clinician can advise on pain relief, protection, and a progressive programme for shoulder motion and strength.

Arrange an assessment after a fall or blow if pain limits arm use, swelling persists, or the joint looks uneven. Seek urgent care when the arm is numb, unusually cold, visibly deformed, or impossible to move, or when severe pain follows major trauma. These signs can indicate an injury needing prompt examination.

Ask which AC joint structures may be involved, whether you need an X-ray or another test, and how long to avoid lifting or contact activity. Ask how to protect the shoulder during sleep and what movement or pain change should lead to an earlier review.