The labrum is a ring of tough, flexible cartilage that lines the rim of a joint socket, acting like a gasket to deepen the socket and keep the ball of the joint firmly in place. You have two major labra in your body: one in each shoulder and one in each hip. These structures are critical for joint stability, and when they tear, they can cause persistent pain, clicking, and a feeling that the joint is catching or giving way.
Where the Labrum Sits and What It’s Made Of
The labrum is made of fibrocartilage, a dense tissue built primarily from type I collagen fibers. It’s tougher and more flexible than the smooth cartilage that covers the ends of your bones, but not as rigid as bone itself. This composition makes it ideal for absorbing force while still conforming to the shape of the joint.
In the shoulder, the labrum (called the glenoid labrum) attaches around the entire perimeter of the shoulder socket. The shoulder socket is naturally shallow, almost like a golf tee holding a golf ball, so the labrum is essential for making that socket deep enough to hold the head of the upper arm bone. It has three distinct layers: a surface mesh, a loosely packed middle layer, and a dense core that provides most of its structural strength. Where it meets the bone, there’s a gradual transition zone that shifts from fibrous tissue to calcified cartilage and then into the bone itself.
In the hip, the labrum (called the acetabular labrum) rings the hip socket. The hip socket is already much deeper than the shoulder socket, but the labrum still adds meaningful depth and creates a seal around the joint.
How the Labrum Keeps Your Joint Stable
Beyond deepening the socket, the labrum creates a suction seal. In the hip, this seal generates negative pressure inside the joint, which resists the ball of the femur being pulled away from the socket. Research has shown that the height of the labrum directly correlates with how strong this seal is. Hips with a labrum taller than 6 mm can resist significantly more distraction force before the seal breaks compared to hips with a smaller labrum. In that study, larger labra maintained the suction seal over roughly three times the distance (7.2 mm versus 2.3 mm) before rupturing.
The labrum also serves as an anchor point for ligaments and other structures that reinforce the joint. It plays a role in proprioception, your body’s ability to sense the position and movement of the joint, and in detecting pain signals that warn you when something is wrong.
Shoulder Labrum vs. Hip Labrum
Both labra share the same basic composition and purpose, but they operate under very different demands. The shoulder is the most mobile joint in the body, sacrificing inherent bony stability for range of motion. That means the shoulder labrum bears a heavier burden for keeping the joint together during overhead movements, throwing, and reaching. The hip, by contrast, is a deeper, more constrained joint built for weight-bearing. Its labrum focuses more on maintaining the suction seal and distributing load during walking, running, and pivoting.
These differences explain why the two joints tend to get injured in different ways. Shoulder labral tears often result from repetitive overhead motion or traumatic dislocations. Hip labral tears more commonly stem from structural abnormalities in the joint, repetitive twisting, or gradual wear.
Common Types of Labral Tears
Labral tears go by different names depending on where in the joint they occur. In the shoulder, the two most well-known types are SLAP tears and Bankart lesions.
- SLAP tear: A tear at the top of the shoulder labrum, where the biceps tendon attaches. “SLAP” stands for Superior Labrum Anterior to Posterior. These are further classified by severity, with Type II being the most common surgical finding. Type II SLAP tears can occur in the front of the labrum (37% of cases), the back (31%), or both (31%).
- Bankart lesion: A tear at the bottom front of the shoulder labrum, typically caused by a shoulder dislocation. This tear compromises the labrum’s ability to prevent the shoulder from dislocating again.
Hip labral tears are usually described by their location (anterior or posterior) and size rather than by named classifications. Anterior tears, at the front of the hip socket, are the most common.
Symptoms of a Labral Tear
A torn labrum in the hip typically causes pain in the hip or groin that gets worse with long periods of standing, sitting, walking, or athletic activity. Many people describe a locking, clicking, or catching sensation in the joint. Stiffness and reduced range of motion are also common.
Shoulder labral tears produce similar mechanical symptoms: clicking, catching, or a sense that the shoulder is slipping. Pain often concentrates deep in the joint and worsens with overhead reaching, throwing, or lifting. SLAP tears frequently cause pain at the front of the shoulder near the biceps, especially during activities that load the arm above shoulder height.
Some labral tears cause no symptoms at all. Imaging studies sometimes reveal labral damage in people who have no pain or functional limitations, which is one reason treatment decisions depend heavily on how much the tear actually bothers you.
How Labral Tears Are Diagnosed
Physical examination can raise suspicion for a labral tear, but imaging is needed to confirm it. Standard MRI detects hip labral tears with about 80% sensitivity, meaning it catches roughly 4 out of 5 tears. MR arthrography, where contrast dye is injected into the joint before imaging, bumps sensitivity up to about 89%. Both methods have similar specificity, meaning they’re comparably good at ruling out tears when none exist. Your doctor will often combine imaging findings with your symptoms and a physical exam to determine whether the labrum is the actual source of your pain.
Treatment Without Surgery
A 2025 consensus statement on hip labral tear management concluded that it’s reasonable to try nonoperative treatment in almost all patients first. The strongest candidates for this approach are people with minimal pain, small or chronic tears, no mechanical symptoms like locking or catching, and no limitations in daily activities. Recreational athletes and older patients also tend to do well without surgery.
The core components of nonsurgical treatment include range-of-motion exercises, strengthening (particularly the glutes and core), functional movement retraining, activity modification, and patient education. Corticosteroid injections can help manage symptoms and are sometimes used diagnostically to confirm the labrum is the pain source. The consensus recommends a multidisciplinary approach involving surgeons, physical therapists, and trainers.
For shoulder SLAP tears treated conservatively, one comparative analysis found 35% pain relief and 25% functional improvement at one year, rising to 45% and 40% at two years. Those numbers are modest, which is why surgery becomes the conversation when nonsurgical treatment stalls.
When Surgery Is Needed
Surgery is typically considered when symptoms persist despite several months of rehabilitation, or when significant mechanical symptoms like locking or catching interfere with daily life. The two main surgical options for shoulder labral tears are arthroscopic repair, where the torn labrum is reattached to the bone, and biceps tenodesis, where the biceps tendon is detached from the labrum and reanchored elsewhere. Hip labral repairs are also performed arthroscopically.
Outcomes vary by procedure. For shoulder SLAP tears, arthroscopic repair achieved 80% pain relief and 70% functional improvement at one year. Biceps tenodesis showed even stronger results: 95% pain relief and 90% functional improvement at one year, climbing to 97% and 95% at two years. Tenodesis tends to be favored when there’s significant involvement of the biceps tendon.
Recovery after shoulder labral surgery generally follows a predictable arc. Most people begin sports-specific training around three months after surgery and return fully to sports between four and six months. The early weeks involve a sling and limited motion to protect the repair, followed by progressive strengthening. Hip labral repair follows a similar phased approach, often with crutches for the first few weeks and a gradual return to full activity over three to six months.