AC Joint Sprain (Separated Shoulder)
Region: Shoulder
Damage to the ligaments connecting the collarbone (clavicle) to the shoulder blade (scapula), usually from a direct fall.
What is a AC Joint Sprain (Separated Shoulder)?
Damage to the ligaments connecting the collarbone (clavicle) to the shoulder blade (scapula), usually from a direct fall.
Symptoms
  • Bump on top of shoulder
  • Pain with arm across chest
  • Bruising
  • Tenderness at top of shoulder
What does a AC Joint Sprain (Separated Shoulder) feel like?
  • Sharp/aching pain on top of shoulder
  • Worse with cross-body movement
What are common causes of a AC Joint Sprain (Separated Shoulder)?
  • Fall onto shoulder
  • Direct impact/contact
Self check
  • Does it hurt at the top of the shoulder when you bring your arm across your chest?
Educational only — not a medical diagnosis.
What to do now
  • Immobilize with a sling for a few days
  • Ice directly over the “bump”
Red flags
  • Skin tenting / collarbone looks like it may poke through the skin
Recovery tips
  • Avoid heavy lifting and cross-body motions until pain-free
Educational only. Not a medical diagnosis.