“I landed on my shoulder, there’s a lump on top now, and I’m meant to be back training next week. Is that realistic?” It is one of the most common questions we get from people who ride, lift or play contact sport, and the honest answer is that it depends on how badly the joint was injured.
What is true across the board is that most AC joint injuries do not need surgery, and that the people who return to training well are the ones who follow a staged plan instead of a calendar date. Below, we cover what the injury is, what recovery looks like, and the signs that mean you need a doctor before you need us.
Who Gets AC Joint Injuries, and What They Feel Like
The AC joint (acromioclavicular joint) is the small joint at the top of the shoulder where your collarbone meets the acromion, the bony tip of your shoulder blade. It is the spot a bag strap or seatbelt sits across. The American Academy of Orthopaedic Surgeons says the usual cause is falling directly onto the shoulder, which is why we see it so often in riders, rugby and AFL players, and gym goers who take a tumble.
Many people tell us their shoulder is “out”. In most cases it is not. The ball and socket joint is fine, and the damage is to the small joint on top, which is why this injury is called a shoulder separation rather than a dislocation.
The giveaway is pain you can cover with one finger on the top of the shoulder. It usually flares when you reach your hand across to the opposite shoulder, press or lift overhead, lie on that side, or have a strap rest on the area. You might see swelling, bruising or a step in the collarbone, and some people notice clicking or weakness when they push.
What Is Actually Going On in the Joint
A separation is a ligament injury first. What you feel depends on which structures were hurt, and by how much.
Two Sets of Ligaments, Two Different Jobs
Ligaments are tough bands that connect bone to bone. The AC ligaments wrap the joint and control small sliding movements. Underneath, the coracoclavicular ligaments run from the collarbone to a hook shaped part of the shoulder blade called the coracoid, and they are the main reason your collarbone stays level with the rest of the shoulder.
Grading the Injury
Clinicians use the Rockwood scale, from grade I to VI. Grade I is a sprain of the AC ligaments. Grade II is a partial tear. Grade III is a complete tear of both sets, and the collarbone sits visibly higher. Grades IV to VI involve more displacement, often backwards or downwards, and are usually referred to an orthopaedic surgeon.
The Bump Is Not the Whole Story
The bump is the end of the collarbone standing proud because the arm and shoulder blade drop away from it. It is not new bone. That is why we judge recovery by strength, movement and confidence under load, not by how the shoulder looks in a mirror.
A Shoulder That Has Forgotten How to Move Together
After the injury, the muscles that steady the shoulder blade, including the trapezius, serratus anterior and deltoid, tend to guard and fire out of sequence. This altered shoulder blade motion is called scapular dyskinesis. A review of rehabilitation after these injuries named pain, fear of movement and stiffness in the upper back and chest wall as the usual obstacles to getting it back.
Pain Settles Faster Than the Ligaments Do
Here is the point that catches keen trainers out. Pain can fade within days, but ligament healing takes much longer. A shoulder that feels fine at rest can still be flared by a heavy session, which is why we progress by tolerance rather than by how good it feels on the day.
What an AC Joint Injury Is Often Mistaken For
A true shoulder dislocation is the usual suspect, since both follow a fall. A broken collarbone, especially near the AC joint, can look and feel the same, and a rotator cuff or labrum injury from the same fall can sit underneath it. Our post on managing rotator cuff injuries covers that overlap.
Not every sore AC joint comes from a fall. Regular heavy pressing can irritate or wear the joint over time, so pain on top of the shoulder without any accident is sometimes mistaken for a new injury. Referred neck pain and upper trapezius strain can also mimic it, and we test each possibility rather than guess from a description.
Red Flags: When to Get Medical Care Urgently
Most AC joint injuries are not emergencies, but a few signs are. Please go to your nearest emergency department, and call 000 if you cannot get there or if you have chest pain or trouble breathing.
Bone pushing up under the skin so it looks tented or about to break through, or any open wound
Numbness, pins and needles, coldness, colour change or a weak pulse in the arm or hand
Chest pain, shortness of breath or sweating, or a heavy blow to the ribs or chest (shoulder pain can also come from the heart)
A head or neck injury in the same fall, including neck pain, confusion, drowsiness or repeated vomiting
Severe pain with a grinding or crunching feeling, or being unable to move the arm at all, which may point to a fracture
A hot, red, swollen joint, especially with a fever
If any of these apply, please see a doctor first. We are happy to take over your rehabilitation once you have been cleared.
What to Do in the Short Term
If none of the red flags apply, the steps below are generally reasonable until you can be assessed.
Support the arm. The weight of the arm hangs off this joint, so rest the elbow on an armrest or pillow when sitting, or tuck your hand into a pocket or waistband when standing.
Use a sling for a few days at most. It can ease the early pain, but a long spell in one will leave the shoulder stiff.
Keep everything else moving. Bend and straighten the elbow, open and close the hand, move the neck, and take gentle walks.
Pause the loaded movements. Avoid pressing, dipping, overhead lifting, heavy carrying, hanging from a bar, reaching across the body and contact sport until you know what you are dealing with. We can help you work out how to keep training the rest of your body.
Take the pressure off the spot. Move bag straps and seatbelts off the top of the shoulder, or pad them.
Prop up to sleep. Lie slightly reclined, or on the other side, with a pillow supporting the sore arm.
Use cold or warmth for comfort. They can ease soreness, though neither speeds up ligament healing.
Ask about pain relief. Speak to your pharmacist or GP, as medicines are not suitable for everyone.
Get assessed within a few days. Sooner if there is a visible bump, you cannot lift the arm, or the impact was heavy.
How We Treat AC Joint Injuries
Our approach follows the same four steps we use for every injury at Elite HP: assess, treat, rehab and elevate. After a brief assessment, our physiotherapists and chiropractors start treating in your first session, and they work as a team, which our post on how chiropractors and physios work together explains in more detail.
Assess: Grade, Rule Out, Baseline
We start with how it happened and what you need to get back to, whether that is a lift, a ride or a season. Then we examine the joint for tenderness and displacement, check the neck, ribs, rotator cuff and collarbone, and test movement and strength on both sides.
We also screen for a fracture. If one is suspected, or the injury looks like a higher grade, we send you for imaging or a medical opinion before we load the shoulder. You leave with a clear plan, measures to track progress and a realistic timeline.
Treat: Settling the Joint From the First Visit
Early on, we work around the injured joint rather than on top of it. Active Release Technique and soft tissue work ease the guarded muscles of the upper back, neck and shoulder, and dry needling (fine needles placed into trigger points) can calm stubborn muscle tension. Taping, cupping and scraping techniques may be added to support the shoulder between visits.
These treatments buy you comfort and movement. They are not the recovery itself, and we pair them with active work right away.
Rehab: Rebuilding Control and Strength
Once movement is comfortable, we rebuild the shoulder in layers, from gentle motion, to control of the shoulder blade and rotator cuff, to proper strength, alongside mobility for the upper back and chest wall. Programs are based on how your shoulder responds, and we do not publish sets and reps for that reason.
There is a candid caveat here. Published, well tested rehabilitation protocols for AC joint injuries are scarce, so good care leans on sound principles, careful monitoring and your response rather than a fixed recipe.
Elevate: Returning to Training
We reintroduce training movements in an order that reflects how much stress they place on the joint. As a general pattern, leg and trunk work and pulling movements come first, then pressing below shoulder height, then overhead and cross body work, then hanging and dipping, and contact last. Your order will differ, and your plan will say so.
We use criteria, not dates. In a systematic review of return to sport after AC joint injury, about 91 percent of athletes returned to sport and about 88 percent returned to their previous level, across surgical and nonoperative care. The same review noted that agreed return criteria are lacking, so we look for painless full movement, strength close to the other side, and confidence under load.
That review also linked starting strengthening within six weeks to a faster return. This is an association, not proof, since milder injuries are the ones likely to start early, so we read it as a reason to keep progressing when the shoulder allows.
A Realistic Recovery Timeline
Timelines depend on the grade, your sport and how the shoulder responds, so please use these phases as a rough guide only.
Weeks 1 to 2: protect and calm. Pain control, joint protection, manual treatment and gentle movement of everything around the shoulder.
Weeks 2 to 6: move and activate. Range of motion returns and we begin loading the stabilising muscles. Milder injuries may be ready for modified training in this window.
Weeks 6 to 12: build and load. Strength work progresses towards your sport or gym demands. Higher grade injuries commonly need this long or longer before heavier pressing or contact.
Beyond 12 weeks: return fully. Contact sport and heavy overhead lifting generally come last. If pain, clicking or a sense of instability lingers, we reassess and consider a specialist opinion.
Do You Need a Scan or Surgery?
A scan is used when it will change the plan. An X ray is typically the first step, to look for a fracture and help grade the injury. Ultrasound or MRI may be added if another structure such as the rotator cuff is in question, or if progress stalls.
Surgery is not the default. Grades I and II are managed without it. For grade III, a recent meta analysis of randomised trials of types III to V found comparable patient reported outcomes at a year or more, and comparable return to work and sport rates, between operative and nonoperative care.
Opinion still varies, though. Higher grades, persistent pain or instability after a proper trial of rehabilitation, and some heavy manual or overhead athletes may reasonably choose surgery. That decision belongs to you and an orthopaedic surgeon, and a good rehabilitation block does not rule it out.
Training Well for the Long Run
A repeat injury usually follows the same pattern: the shoulder went back to full load before it had the control to take it. Once you are training again, keep some stabiliser work in your program, balance your pulling with your pressing, and add volume in small steps rather than jumps.
If you ride or play collision sport, learning to fall and wearing protective gear where the sport allows will lower the odds of landing on the point of the shoulder again. A lasting bump is generally harmless, but new pain on heavy pressing, clicking or a feeling of the joint shifting is worth a check.
If your shoulder has been sore since a fall, or you are not sure whether it needs a doctor first, a proper assessment is the quickest way to find out. Book an assessment at our Bowen Hills, Toowong or Coorparoo clinic, and we will work out what is going on and build the plan back to training. If you would rather talk first, you can request a free phone consultation through our website, and our shoulder pain page has more on how we treat shoulder problems.
FAQ
Do AC joint injuries heal on their own?
Milder ones usually settle with sensible loading, and even higher grades often reach good function without surgery, though a bump may remain.
Can I keep training with an AC joint injury?
Often yes, with changes. Leg, trunk and conditioning work that does not load the arm can usually continue, and we help you sort out what is safe.
How long until I can lift or play again?
It depends on the grade and how your shoulder responds. We go by painless movement, strength and confidence, not a fixed date.
Will I need surgery?
Most people do not. It is considered for higher grades, or when persistent pain or instability follows a proper course of rehabilitation.
Will the bump go away?
Often it stays to some degree. It is typically a cosmetic change, and function is what we monitor.
Should I see a physio or a chiropractor?
Either can assess the injury. In the early stage the priority is protecting and then gradually loading the shoulder, and our physios and chiropractors coordinate so you get one plan.
