Popping, clicking, and crackling sounds in the shoulder after surgery are common and, in most cases, completely harmless. The majority of these noises come from mundane sources: gas bubbles shifting inside the joint, soft tissue gliding over newly repaired or healing structures, and scar tissue stretching as you regain range of motion. That said, not every pop is benign, and there are specific patterns that warrant a call to your surgeon. Understanding what drives these sounds and which ones matter can take a lot of the anxiety out of early recovery.
Why Shoulders Make Noise After Surgery
Even healthy, unoperated shoulders make noise. If you roll your shoulder in a quiet room, you’ll often hear faint clicks or soft grinding. After surgery, these everyday sounds tend to get louder and more frequent for a while, which makes sense when you consider what the joint has been through. The tissues have been cut, stitched, or anchored; swelling changes how structures sit against one another; and weeks of immobilization leave muscles stiff and slightly wasted. All of that alters the way tendons, ligaments, and cartilage interact as they slide past each other during movement.
One of the most common causes of a painless pop is simple gas-bubble formation inside the joint. When two joint surfaces pull apart, the fluid between them can’t fill the widening gap fast enough, and a gas cavity forms with an audible crack. Researchers have captured this on real-time MRI, confirming that opposing joint surfaces resist separation until a critical point where they suddenly pull apart and create a sustained gas cavity, a process called tribonucleation.1PubMed Central. Real-time visualization of joint cavitation This is the same mechanism behind cracking your knuckles, and it is just as harmless in a recovering shoulder.
Beyond gas bubbles, tendons and ligaments that have been surgically tightened or re-anchored need time to settle into their new positions. During that adjustment period, a tendon may snap lightly over a bony prominence or a repaired labrum may shift slightly as you move through certain arcs. Mild swelling in the early weeks also changes the spacing inside the joint, making these soft-tissue gliding sounds more noticeable than they were before the operation.
Scar Tissue and Its Role in Postoperative Noise
Your body lays down scar tissue as part of the normal healing response any time a surgeon cuts into soft tissue. Inside a joint, that new collagen doesn’t always align neatly along the direction of movement. Instead, collagen fibrils can form in irregular orientations, and the resulting adhesions may cause stiffness and audible snapping as you start pushing into ranges of motion the scar tissue resists.2Taylor & Francis Online (Connective Tissue Research). Arthrofibrosis and large joint scarring When you stretch past one of these adhesions for the first time, you might feel a sudden release accompanied by a pop or a tearing sensation, followed almost immediately by improved motion in that direction.
This is actually a sign of progress, not damage. Physical therapists often hear patients describe a “pop and then it moved further,” which usually means a band of scar tissue gave way. The sensation can be startling, and there may be mild soreness afterward, but it rarely indicates structural harm. Where scar tissue becomes a clinical problem is when it accumulates to the point of significantly restricting motion, a condition called arthrofibrosis. In that scenario the noise is the least of your concerns; the real issue is the loss of functional range. But for the average patient working through a normal rehab protocol, occasional pops tied to gradual gains in mobility are expected.
Snapping Around the Shoulder Blade
Not all postoperative popping originates inside the shoulder joint itself. Some of it comes from behind the shoulder blade, where the scapula glides over the ribcage. Snapping scapula syndrome produces an audible or palpable crackling during these sliding movements, and it can be caused by changes in scapular shape, muscular imbalances around the scapula, or, more rarely, bony growths.3PubMed Central. Snapping scapula syndrome: pictorial essay After shoulder surgery, the muscles that stabilize your scapula often weaken from disuse during immobilization, making it more likely that the shoulder blade tracks unevenly against the ribs when you start moving again.
The sound is often described as a deep, gritty grinding rather than a sharp click, and it tends to be most obvious when you raise your arm overhead or pull it back behind your body. For most people, this resolves as the stabilizing muscles regain strength through targeted rehabilitation. In fact, physical therapy focused on scapular muscle strengthening is curative in the majority of cases, and anti-inflammatory medication can help manage any associated discomfort.4PubMed. The snapping scapula: diagnosis and treatment Surgery for snapping scapula is rarely needed and is generally reserved for cases where structured rehab has failed and symptoms persist for many months.
When Popping Is a Warning Sign
So when should a pop actually concern you? The key distinction is almost always whether pain or mechanical catching accompanies the noise. A painless click during a stretch or a soft crackle when you first move in the morning is rarely meaningful. But a sharp pop accompanied by sudden pain, a feeling that something is catching or locking inside the joint, or a grinding sensation that worsens over the course of days rather than improving deserves medical attention.
One specific scenario surgeons watch for involves hardware loosening. Many shoulder procedures use anchors, screws, or sutures to reattach torn tissue to bone. Biodegradable anchors, in particular, can occasionally fragment or migrate as they dissolve, creating loose bodies inside the joint. Researchers have documented that unexpected postoperative symptoms such as painful catching, popping, or “squeaking” may indicate a loose body in the shoulder joint and warrant arthroscopic evaluation.5Arthroscopy: The Journal of Arthroscopic & Related Surgery. Biodegradable Shoulder Anchors Have Unique Modes of Failure A loose body acts like a pebble in a shoe, getting pinched between moving surfaces and causing sharp, reproducible catching at specific points in your range of motion.
Other red flags worth knowing include:
- Sudden new popping with pain: If the shoulder was quiet for weeks and then starts clicking painfully after a specific incident, such as a fall or an overly aggressive stretch, something may have re-torn or shifted.
- Grinding that gets progressively worse: Mild crepitus that improves over weeks is normal healing. Grinding that worsens steadily can suggest cartilage damage or developing arthritis in the joint.
- Swelling or warmth alongside the noise: Inflammation paired with new joint sounds can point to infection, hardware irritation, or a flare of the healing response that needs management.
- Locking or inability to move through a specific arc: If your shoulder catches in one position and you have to physically wiggle it free, a mechanical obstruction such as a loose body or a displaced repair is likely.
If any of these patterns show up, contacting your surgeon’s office is the right move. Most of the time even these scenarios are manageable, but catching a loose anchor or a partial re-tear early leads to much simpler interventions than waiting months.
How Doctors Evaluate Persistent Popping
When you report ongoing or concerning popping to your surgeon, the first step is usually a hands-on physical exam. Your doctor will move your shoulder through its full range while listening and feeling for where the click or catch occurs. The position of the arm and the arc of motion where the noise is loudest tells them a lot about which structure is involved.
If the exam doesn’t settle the question, imaging is the next step. Standard X-rays can pick up loose hardware, displaced anchors, or bony abnormalities. For soft-tissue problems, dynamic ultrasound is particularly useful because the radiologist can watch the tendons and muscles in real time as you move. This capability for real-time evaluation is a major advantage, especially when a problem only appears during motion and looks normal on a static image.6PubMed Central. Dynamic ultrasonography of the shoulder Ultrasound is also inexpensive and widely available, which makes it a practical first-line imaging choice before resorting to MRI.
MRI, sometimes with contrast dye injected into the joint, remains the gold standard for evaluating labral tears, rotator cuff integrity, and cartilage surfaces. If your surgeon suspects that the popping reflects a structural problem with the repair itself, an MRI arthrogram will usually give the clearest picture. In some cases, the answer only becomes fully clear during a diagnostic arthroscopy, where a small camera is inserted into the joint. This is less common and typically reserved for situations where imaging results are ambiguous but symptoms are significant enough to justify a look inside.
The Rehab Timeline and When Noises Typically Resolve
Most patients notice the heaviest period of popping and clicking between about four and twelve weeks after surgery. This window coincides with the transition from passive motion (where a therapist moves your arm for you) to active motion (where your own muscles are doing the work). During passive motion, the joint is being moved slowly and carefully, so noises tend to be minimal. Once you start engaging your own muscles, tendons begin snapping over healing tissue, scar adhesions encounter resistance, and gas bubbles form more readily because the joint is being loaded differently.
By three to four months, as strength returns and scar tissue remodels, most of the extraneous noise fades. Some people retain a mild clicking with overhead movements for six months or longer, especially after labral repair or rotator cuff surgery. In the absence of pain, this lingering click is almost never clinically significant. It often represents a subtle change in how the repaired tissue sits compared to pre-injury anatomy, and it becomes less noticeable as you stop monitoring every sensation in the joint.
Your physical therapist is one of your best resources for real-time reassurance during this phase. They see dozens of post-surgical shoulders at any given time and can quickly distinguish a normal rehab pop from something that needs a closer look. If your therapist says “that’s fine, keep going,” they are almost certainly right.
Fear of Movement and Why It Matters
One underappreciated consequence of postoperative popping is psychological. When every stretch produces an unexpected click or snap, some patients develop a deep reluctance to move the shoulder at all. This fear of re-injury, known clinically as kinesiophobia, has been shown to negatively affect functional outcomes after rotator cuff repair.7PubMed Central. Kinesiophobia could affect shoulder function after repair of rotator cuff tears Patients who avoid movement because they associate joint sounds with damage tend to regain range of motion more slowly, develop more stiffness, and report lower satisfaction with their surgical outcome.
The irony is that the avoidance itself creates more of the very stiffness that leads to louder pops later. A shoulder that hasn’t been moved regularly accumulates more adhesions, and when those adhesions finally break, the resulting pop is even more dramatic, reinforcing the fear. Breaking this cycle usually involves a combination of patient education, where understanding the causes of popping reduces the threat it poses, and graded exposure to movement under a therapist’s guidance.
If you find yourself flinching away from exercises or skipping therapy sessions because of the sounds your shoulder makes, mention it to your physical therapist. They can adjust the program to expose you gradually to the ranges where popping occurs, building your confidence that the noise does not equal injury. This behavioral component of rehab is just as important as the physical strengthening work.
Research Into Measuring Joint Sounds
An interesting frontier in orthopedic research involves using joint sounds as diagnostic information rather than dismissing them as noise. Researchers have explored whether vibration signals recorded from the shoulder during standard physical exam maneuvers can distinguish healthy joints from pathological ones. Early work found that even among people with no shoulder problems, it was difficult to tell the dominant shoulder from the nondominant shoulder using vibration data alone; a neural network tasked with classifying signals averaged only about 50% sensitivity, essentially a coin flip.8Digital Commons @ Kettering University. Do Shoulder Vibration Signals Vary Among Asymptomatic Volunteers
The implication is that normal shoulders produce a wide and overlapping range of sounds, which makes it hard to define a clear baseline for “healthy” versus “abnormal.” Ongoing research aims to refine sensor technology and signal processing to the point where a wearable device could flag specific acoustic patterns associated with hardware loosening, cartilage loss, or tendon fraying. That technology isn’t clinically available yet, but it signals where the field is headed: a future where the pops and clicks your shoulder produces might actually carry useful diagnostic data rather than just anxiety.
Differences by Surgery Type
The type of surgery you had influences which kinds of popping you’re likely to experience and how concerned you should be about them. After arthroscopic rotator cuff repair, soft clicking during the first few months is extremely common and usually reflects the repaired tendon settling against its new anchor point. After labral repair (such as a Bankart procedure for instability), patients often notice a clunking sensation at the end range of external rotation, which diminishes as the labrum heals and the capsule tightens.
Total shoulder replacement and reverse shoulder replacement produce their own characteristic sounds. A low-grade grinding or crepitus is common in the early months as the metal and plastic components seat themselves and the surrounding soft tissues adapt. This tends to fade significantly by six months. Persistent clicking in a replacement shoulder can occasionally indicate polyethylene wear or component loosening, but this is uncommon in the first year and much more of a long-term surveillance concern.
After surgery involving suture anchors, the anchor material itself can be a noise source. Metal anchors are permanent and generally quiet once seated. Biodegradable anchors are designed to dissolve over months, and during that dissolution period, fragments can occasionally break free and cause catching sensations. Your surgeon will have noted which type of anchor was used, and that detail matters when interpreting any new mechanical symptoms months down the line.
Practical Tips for Managing Postoperative Popping
You can’t silence a recovering shoulder, but a few practical strategies help reduce noise and, more importantly, reduce the worry that accompanies it.
- Warm up before exercises: Gentle pendulum swings and slow circles for a minute or two before your formal therapy routine improve blood flow and lubricate the joint, which tends to quiet the initial round of clicks.
- Stay consistent with rehab: Skipping sessions for several days and then jumping back in produces louder pops because adhesions have had time to set. Regular daily movement keeps the joint surfaces gliding smoothly.
- Keep a brief log: Note when popping happens, what motion triggers it, and whether pain accompanies it. This log is enormously helpful if you do end up calling your surgeon, because it turns a vague complaint into specific information they can act on.
- Avoid forcing through pain: A painless pop during a stretch is fine to work through. A painful catch that stops you mid-motion is your body telling you to back off and report it.
Most patients find that by the time they’re four to six months out from surgery, they’ve stopped noticing the sounds entirely, not because the sounds have fully disappeared, but because the brain has reclassified them as irrelevant background noise. That reclassification is a normal and healthy part of recovery, and it happens faster when you understand why the sounds are there in the first place.