Separated Shoulder

A separated shoulder is an injury to the joint at the top of your shoulder, where your collarbone meets your shoulder blade. This joint, called the acromioclavicular (AC) joint, is held together by strong ligaments. When these ligaments are stretched or torn, the collarbone can separate from the shoulder blade, causing pain and sometimes a visible bump.

What is Separated Shoulder?

A separated shoulder is an injury to the acromioclavicular (AC) joint, located at the very top of your shoulder. This joint connects your collarbone (clavicle) to the highest part of your shoulder blade (acromion). The injury involves stretching or tearing the strong ligaments that hold these two bones together, causing them to separate.

Unlike a dislocated shoulder, which involves the ball-and-socket joint of the arm, a separated shoulder specifically affects the AC joint. This distinction is important because the treatment and recovery can differ significantly. The severity of a separated shoulder is typically graded from I to VI. Grade I is a mild sprain where the ligaments are stretched but not torn, while higher grades involve increasing tearing of the ligaments and greater separation of the bones, potentially leading to a noticeable bump on the shoulder. The main ligaments involved are the acromioclavicular (AC) ligaments, which connect the acromion and clavicle directly, and the coracoclavicular (CC) ligaments, which provide additional support by connecting the collarbone to a different part of the shoulder blade. Damage to these ligaments determines the grade of the injury.

Symptoms

Symptoms of a separated shoulder usually include pain at the top of the shoulder, tenderness to the touch, and swelling. You might also notice bruising or have difficulty moving your arm, especially when lifting it. In more severe cases, a visible bump may appear on top of the shoulder.

The pain from a separated shoulder can range from mild discomfort to severe, sharp pain, depending on how badly the ligaments are damaged. This pain is typically focused directly on the AC joint. Along with pain, you may experience tenderness when pressing on the top of your shoulder, and the area might look swollen or bruised. These signs indicate inflammation and bleeding under the skin due to the injury. Moving your arm, particularly reaching overhead or across your body, can become difficult and painful. The range of motion in your shoulder may be limited, making everyday tasks challenging. For more severe separations, the collarbone may visibly lift, creating a noticeable bump under the skin.

Causes & risk factors

A separated shoulder is typically caused by a direct impact to the shoulder, such as falling directly onto the top of your shoulder or receiving a hard blow. This type of injury is common in sports that involve falls or collisions, like football, rugby, hockey, skiing, and cycling.

The most common way to separate your shoulder is a fall that lands directly on the outside of your shoulder, driving the shoulder blade downwards while the collarbone stays in place. This force can stretch or tear the AC and CC ligaments. Another common cause is a direct blow to the shoulder, often seen in contact sports. For example, a tackle in football or a collision during a hockey game can exert enough force to injure the AC joint. While anyone can experience a separated shoulder, individuals participating in high-impact sports or activities with a risk of falls are at a higher risk. These activities increase the likelihood of the specific types of impacts that cause this injury.

How it's diagnosed

A separated shoulder is diagnosed through a physical examination and imaging tests. Your doctor will carefully check your shoulder for tenderness, swelling, and any visible deformity, and assess your range of motion. X-rays are usually taken to confirm the diagnosis and determine the severity of the separation.

During the physical exam, your doctor will gently feel your shoulder to pinpoint the exact location of pain and tenderness, often directly over the AC joint. They will also observe if there is any visible bump or asymmetry compared to your other shoulder. To assess the extent of the injury, your doctor will ask you to move your arm in different directions. This helps determine how much your range of motion is limited and which movements cause pain. X-rays are the primary imaging tool used. They can show if the collarbone has moved out of alignment with the shoulder blade. Sometimes, "stress X-rays" are taken, where you hold a weight in your hand, to better reveal the separation if it's not obvious on a standard X-ray. This helps the doctor accurately grade the injury.

Treatment options

Treatment for a separated shoulder typically starts with non-surgical methods, including rest, ice, pain relievers, and using an arm sling for support. Physical therapy is often recommended to restore strength and movement. Surgery may be considered for more severe separations or if non-surgical treatments do not provide relief.

For most separated shoulders, especially less severe ones (Grades I and II), non-surgical treatment is effective. This approach focuses on managing pain and allowing the ligaments to heal. Rest is crucial, meaning avoiding activities that worsen pain. Applying ice packs to the injured area for 15-20 minutes several times a day can help reduce swelling and pain. Over-the-counter pain relievers, such as nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or naproxen, can help manage pain and inflammation. Your doctor might also recommend an arm sling to support your arm and keep the shoulder still, which promotes healing and reduces discomfort. Once the initial pain subsides, physical therapy is a vital part of recovery. A physical therapist will guide you through exercises designed to restore your shoulder's range of motion, flexibility, and strength. This helps prevent stiffness and ensures a full return to your normal activities. For more severe separations (Grade III and higher), the decision between surgical and non-surgical treatment can be complex. Current evidence from randomized controlled trials is insufficient to definitively determine if surgery is better than non-surgical approaches for acute AC joint dislocations. Your doctor will discuss the pros and cons of each option, considering factors like your activity level, the degree of separation, and your overall health. Surgery aims to repair or reconstruct the torn ligaments and stabilize the AC joint.

Recovery & outlook

Recovery from a separated shoulder varies depending on the injury's severity, but most people recover fully. Mild separations usually heal within a few weeks, while more severe injuries can take several months, especially if surgery is needed. Physical therapy is key to regaining full strength and range of motion.

For Grade I and II separations, you can typically expect to return to light activities within a few weeks. Full recovery, including a return to sports or strenuous work, might take 6 to 12 weeks. The initial focus is on pain control and protecting the joint, followed by gradual rehabilitation. More severe separations, including Grade III, often require a longer recovery period, potentially several months. Even without surgery, these injuries need careful management and a dedicated physical therapy program to ensure proper healing and prevent long-term problems. If surgery is performed, the recovery process will be more extensive, involving a period of immobilization followed by a structured physical therapy regimen. The overall outlook is generally good, with most individuals regaining good shoulder function. However, some people might experience lingering stiffness, weakness, or occasional pain, especially with strenuous activities, or a persistent bump at the AC joint.

When to see a doctor

You should see a doctor if you experience severe shoulder pain, a noticeable deformity or bump on your shoulder, or if you cannot move your arm normally after an injury. These signs could indicate a more serious separated shoulder or another type of shoulder injury that requires prompt medical attention.

It's important to seek medical evaluation promptly after any significant shoulder injury, especially if the pain is intense and doesn't improve with rest. Early diagnosis helps ensure you receive the correct treatment for your specific injury. If you notice a significant bump or an unusual shape at the top of your shoulder, this could indicate a higher-grade separation where the collarbone has moved significantly out of place. A doctor can assess this and determine the best course of action. Any inability to lift your arm, move it through its normal range, or bear weight on it warrants a medical visit. These symptoms can suggest not only a separated shoulder but also other serious injuries like a fracture or a complete rotator cuff tear, which need immediate professional assessment.

Frequently asked questions

Is a separated shoulder the same as a dislocated shoulder?

No, a separated shoulder is different from a dislocated shoulder. A separated shoulder involves the acromioclavicular (AC) joint at the top of your shoulder, where the collarbone meets the shoulder blade. A dislocated shoulder, however, means the ball of your upper arm bone has come out of the socket in your shoulder blade.

How long does it take for a separated shoulder to heal?

The healing time for a separated shoulder depends on its severity. Mild separations (Grade I and II) usually heal within a few weeks, allowing a return to normal activities. More severe separations (Grade III and higher) can take several months to fully recover, especially if surgery is required.

Can I still move my arm with a separated shoulder?

You might be able to move your arm, but it will likely be painful and your range of motion will be limited. The degree of pain and limitation depends on how severe the separation is. In more severe cases, moving your arm, especially lifting it overhead, can be very difficult or impossible.

Will I always have a bump on my shoulder after a separation?

Not always. For mild separations (Grade I and II), there usually isn't a noticeable bump. In more severe separations (Grade III and higher), the collarbone may be significantly displaced, creating a visible bump on top of the shoulder. This bump may remain even after healing, though it often doesn't cause functional problems.

Do all separated shoulders require surgery?

No, most separated shoulders do not require surgery. Mild to moderate separations (Grades I, II, and often Grade III) are typically treated successfully with non-surgical methods like rest, ice, pain relief, and physical therapy. Surgery is usually reserved for severe separations or when non-surgical treatments fail to provide adequate relief.

What kind of exercises can I do during recovery?

During recovery, a physical therapist will guide you through specific exercises. Initially, these might focus on gentle range-of-motion movements to prevent stiffness. As healing progresses, exercises will advance to strengthen the shoulder muscles and improve stability. It's crucial to follow your therapist's instructions to avoid re-injury.

Sources

• MedlinePlus — Separated Shoulder
• Mayo Clinic — Separated Shoulder
• Cochrane Library — Separated Shoulder