A torn labrum is a rip in the ring of tough cartilage that lines the rim of your shoulder socket. This cartilage, called the labrum, deepens the shallow socket by about 50% and helps hold the ball of your upper arm bone in place. When it tears, the shoulder can feel painful, unstable, or like something is catching inside the joint.
What the Labrum Does
Your shoulder is the most mobile joint in your body, but that freedom of movement comes with a trade-off: the socket is remarkably shallow. The ball of the upper arm bone is much larger than the bony socket it sits in. The labrum compensates for this mismatch. It’s a thick rim of fibrous cartilage that rings the entire edge of the socket, essentially acting as a bumper that makes the socket deeper and more cup-shaped.
The labrum contributes about 10% of what researchers call concavity-compression stability, a biomechanical principle where a deeper cup resists an object sliding out of it. That might sound modest, but the labrum also serves as an anchor point for the ligaments and tendons that surround the shoulder, including the tendon of the biceps muscle. It creates a seal that helps maintain pressure inside the joint, which further keeps the ball centered in the socket. When the labrum tears, all of these functions can be compromised.
Types of Labral Tears
Labral tears are named by where they occur along the rim of the socket, and the location matters because it affects which structures are involved and how the shoulder behaves afterward.
- SLAP tears occur at the top of the socket, where the biceps tendon attaches. SLAP stands for “superior labral tear, anterior to posterior.” These are graded in types. A Type I is just fraying along the edge with the attachment still intact. Type II involves the labrum actually pulling away from the bone, destabilizing the biceps anchor. Types III and IV involve bucket-handle tears, where a flap of cartilage can fold into the joint and cause mechanical catching.
- Bankart lesions occur at the front and bottom of the socket and are closely tied to shoulder dislocations. When the shoulder pops out of joint, it often tears the labrum in this area on its way out. These tears are a major reason dislocations tend to recur.
- Posterior labral tears affect the back of the socket and are less common. They can result from repetitive stress or trauma that drives the arm bone backward.
Some tears extend across multiple zones of the labrum, and complex tears involving both SLAP and Bankart regions are not unusual after significant injuries.
Common Causes
Labral tears generally fall into two categories: a single traumatic event or gradual wear from repetitive motion. A fall onto an outstretched hand, a direct blow to the shoulder, or a sudden pull on the arm (like catching something heavy) can tear the labrum in one moment. Shoulder dislocations are one of the most common acute causes.
Repetitive overhead motion is the other major culprit. Baseball pitchers, swimmers, volleyball players, and anyone who regularly works with their arms overhead place repeated stress on the labrum. Over time, this can cause the tissue to fray and eventually tear. This is why SLAP tears in particular are sometimes called the “overhead athlete’s injury.” Age also plays a role. The labrum becomes more brittle and prone to fraying as you get older, and degenerative tears in people over 40 are common even without a specific injury.
What a Torn Labrum Feels Like
The hallmark symptoms are a deep, hard-to-pinpoint ache inside the shoulder and a sense that the joint isn’t stable. Many people describe a catching, clicking, popping, or grinding sensation when they move the arm, especially during overhead reaching or rotation. Some feel like the shoulder might “give out” or slip partially out of place.
Pain often worsens with specific movements rather than being constant. Reaching behind your back, lifting overhead, or throwing can all provoke it. Night pain is common, particularly when lying on the affected side. In cases linked to instability (like Bankart lesions), you may feel apprehensive or guarded when your arm is in certain positions, as if the shoulder could dislocate again.
Not all labral tears cause symptoms. Small degenerative tears, especially in older adults, are sometimes found incidentally on imaging done for other reasons.
How Labral Tears Are Diagnosed
Diagnosis typically starts with a physical exam where your doctor moves your arm into specific positions designed to stress the labrum. Several named tests exist for this, though none are perfectly reliable on their own. The sensitivity of individual clinical tests ranges from about 65% to 83% depending on the tear location, meaning a negative exam doesn’t always rule out a tear.
Imaging is usually needed to confirm the diagnosis. A standard MRI can detect labral tears, but its accuracy varies widely, with reported sensitivity ranging from 44% to 93%. MR arthrography, where contrast dye is injected into the joint before the scan, performs better. Studies report about 92% sensitivity and specificity for detecting labral tears with this technique, making it the preferred imaging method when a tear is suspected. The dye fills the joint space and highlights separations between the labrum and bone that a standard MRI might miss.
Treatment Without Surgery
Conservative treatment is the starting point for most labral tears. This centers on physical therapy focused on strengthening the muscles around the shoulder blade and rotator cuff, which can compensate for some of the stability the torn labrum no longer provides. Anti-inflammatory medications help manage pain in the short term.
Therapy typically targets several goals in sequence: first controlling pain and inflammation, then gradually restoring range of motion, and finally rebuilding strength and stability. The emphasis on scapular (shoulder blade) strengthening is key because the muscles that control the shoulder blade play a major role in keeping the joint centered during movement. Neuromuscular training, which retrains the shoulder’s reflexive stabilizing patterns, is also a standard component.
For tears that are primarily degenerative, or for small tears without significant instability, conservative treatment is often sufficient. Younger patients with Bankart lesions from dislocations tend to have higher failure rates with conservative care because the underlying instability is harder to address without repairing the torn tissue.
When Surgery Is Needed
Surgery becomes the next step when symptoms persist despite several months of physical therapy. The typical threshold is six months of failed conservative treatment, along with imaging confirmation of the tear. Significant mechanical symptoms (a flap of cartilage catching in the joint) or recurrent instability episodes may accelerate the decision.
The procedure is almost always done arthroscopically, using small incisions and a camera. The surgeon either reattaches the labrum to the bone using small anchors and sutures, or in some cases trims away damaged tissue that can’t be meaningfully repaired. The choice depends on the tear type, its location, and the patient’s activity level and goals.
Recovery After Surgery
Recovery follows a predictable but extended timeline. You’ll wear a sling for four to six weeks to protect the repair while the tissue heals back to bone. During this sling phase, gentle range-of-motion exercises begin almost immediately, supervised by a physical therapist, to prevent the shoulder from getting too stiff.
Around seven to ten days post-surgery, the incisions are checked and sutures removed. Over the next several weeks, therapy gradually progresses from passive motion (the therapist moves your arm) to active motion (you move it yourself). Full active range of motion is typically expected by about nine weeks. Strengthening exercises ramp up after that, with a goal of reaching near-normal strength by 12 to 16 weeks.
Sports-specific training generally starts around three months, with full return to sports at four to six months. For overhead throwing athletes, the timeline is longer. A structured throwing program typically doesn’t begin until around four months, with full throwing status at six to eight months. Discharge criteria include full strength compared to the uninjured side, complete and pain-free range of motion, and successful completion of sport-specific functional tests.
Long-Term Outlook
One of the more important things to understand about labral tears, particularly those associated with shoulder instability, is their connection to long-term joint health. A population-based study following patients for an average of 15 years after a shoulder instability event found that about 23% developed symptomatic arthritis. For context, similar rates of arthritis normally appear in people two to three times older, suggesting that labral tears and instability accelerate joint wear significantly.
Interestingly, in that same study, rates of arthritis were similar whether patients had surgery (28%) or not (17%), with no statistically significant difference between the two groups. This suggests that while surgery restores stability and function, the initial injury to the joint surface itself carries long-term consequences regardless of how it’s treated. Maintaining shoulder strength and avoiding re-injury are the most practical ways to protect the joint over time.