Why Does One Shoulder Blade Stick Out More Than the Other?

When one shoulder blade sticks out more than the other, it’s often due to scapular winging. This condition develops when the muscles that stabilize your shoulder lose proper function, leading to weakness in the rhomboids or lower trapezius. As this weakness progresses, the shoulder loses stability, and the affected shoulder blade gradually lifts away from the rib cage, which results in an uneven appearance.

If you notice one shoulder blade sticking out or pain with movement, Total Orthopedics and Sports Medicine can help. Our specialists perform detailed exams to assess muscle weakness, nerve function, and posture. We also provide same-day imaging to determine the cause of scapular winging accurately. Call 855-321-6784 now to begin your recovery.

What Are the Common Causes of Uneven Shoulders?

Uneven shoulders often develop when muscle imbalances, tightness, or nerve injuries interfere with normal shoulder alignment. In many cases, poor posture or repetitive lifting creates uneven tension across the upper back and shoulder muscles. With continued muscle imbalance, the shoulder’s normal movement pattern changes; one side lifts and rotates outward, resulting in visible asymmetry and ongoing discomfort.

Here are some other common causes that can contribute to uneven shoulders:

• Scapular dyskinesis: Poor shoulder blade control leads to abnormal scapular motion and uneven muscle coordination.
• Winged scapula: Injury to the long thoracic nerve causes the shoulder blade to protrude instead of resting flat.
• Rotator cuff weakness: Damage or reduced strength in these stabilizing muscles disrupts alignment and control of movement.
• Tight levator scapulae or upper trapezius: Overactivity in these muscles pulls one shoulder upward or outward.
• Dorsal scapular nerve injury: Damage to this nerve weakens the rhomboids, reducing scapular stability during movement.

Can Shoulder Injuries Or Muscle Weakness Cause Scapular Winging?

Yes, both shoulder injuries and muscle weakness can cause scapular winging by reducing the stability of your shoulder blade along the rib cage. This condition often develops when key shoulder muscles (the rotator cuff, serratus anterior, and periscapular muscles) lose strength or coordination. As the imbalance worsens, the scapula moves out of alignment with the shoulder joint, resulting in a visible protrusion and reduced shoulder control.

In fact, research published in Disorders of the Scapula and Their Role in Shoulder Injury found that scapular dyskinesis (abnormal shoulder blade motion) occurs in up to 68–100% of shoulder injuries. The study noted that this disrupted motion affects rotator cuff function, increases strain on surrounding muscles, and contributes to scapular winging, especially during overhead or repetitive activities.

Is a Winged Shoulder Blade Always a Sign of Nerve Damage?

No, a winged shoulder blade is not always a sign of nerve damage. In many patients, it develops from muscle imbalance, tight muscles, or poor postural alignment rather than nerve injury. While nerve injuries, such as damage to the long thoracic or spinal accessory nerve, can weaken shoulder stability, muscle imbalances can also cause the shoulder blade to lift away from the rib cage.

As the shoulder blade lifts, surrounding muscles such as the lower trapezius, rhomboids, and serratus anterior lose coordination and strength. This loss of control makes shoulder movement less stable and often painful during daily activities. Since these symptoms result from multiple causes, identifying the underlying source of scapular winging is essential for selecting the appropriate treatment approach. To confirm the diagnosis, your healthcare provider may perform a physical examination and specific tests such as the scapular retraction test.

Can Scoliosis or Spinal Misalignment Lead to Uneven Shoulder Blades?

Yes, scoliosis or spinal misalignment can cause uneven shoulder blades by altering the natural alignment of your spine and disrupting muscle balance across the upper back. When your spine curves abnormally, it creates asymmetric tension in the supporting muscles, which affects shoulder positioning and overall balance. As a result, one shoulder blade may appear higher, rotated outward, or more prominent than the other.

These alignment changes alter the scapular resting position and limit shoulder mobility. Over time, the muscles on one side of your upper back tighten, while those on the opposite side lose strength. This muscle imbalance restricts your range of motion and can lead to shoulder pain or discomfort during routine activities.

How Do Doctors Diagnose A Winged Shoulder Blade?

Doctors diagnose a winged shoulder blade through a detailed physical examination that assesses your posture, muscle strength, and shoulder motion. During this assessment, your doctor may ask you to perform a wall push-up test to check for abnormal scapular motion. In some cases, other tests such as scapular assistance or reposition assessments are used to analyze muscle coordination and determine if the issue involves muscle weakness or nerve damage.

Here are additional diagnostic methods your doctor may use to identify the cause of a winged shoulder blade:

• Electromyography (EMG): Measures electrical activity in the shoulder muscles to detect possible nerve injury.
• Imaging tests: X-rays, MRI, or ultrasound help identify muscle tears, nerve compression, or other structural abnormalities.
• Range-of-motion assessment: Analyzes how scapular instability impacts your shoulder flexibility and joint function.

At Total Orthopedics and Sports Medicine, you receive advanced diagnostic care under the guidance of Dr. R. Champ Dengenis, a board-certified orthopedic surgeon with expertise in complex shoulder and spinal disorders. With a patient-focused approach, Dr. Dengenis assesses the underlying cause of your condition and develops a plan to restore scapular stability and prevent long-term shoulder dysfunction. Contact us today to schedule your appointment.

What Movements or Activities Worsen the Scapular Winging?

Activities such as overhead pressing, heavy lifting, and standard push-ups without proper engagement of the serratus anterior can worsen scapular winging by straining the shoulder. In addition, carrying one-strap bags or uneven weights on one shoulder increases asymmetrical load and causes the shoulder blade to lift or rotate abnormally during movement.

Here are some movement patterns that can further worsen scapular winging:

• Repetitive overhead sports movements
• Poor posture during desk work
• Sleeping on one side of the shoulder

Can Resistance Bands Help Correct Shoulder Blade Winging?

Yes, resistance bands can help you correct shoulder blade winging because they strengthen the muscles that stabilize your scapula and support proper movement. When used correctly, these resistance exercises activate your serratus anterior, lower trapezius, and rhomboids to improve shoulder alignment and control.

Moreover, performing focused resistance band exercises such as serratus punches, band-assisted wall slides, and rows allows you to build shoulder stability and restore balanced movement gradually. In fact, research published in the Archives of Physical Medicine and Rehabilitation shows that elastic band–based scapular stabilization exercises improved shoulder strength and motion control in patients with scapular dyskinesis.

Similarly, a case study in the Archives of Medicine and Health Sciences involving a volleyball player showed that an eight-week resistance band program led to significant improvement in scapular control and a reduction in shoulder pain. These results confirm that consistent, progressive resistance training can restore shoulder stability and reduce the risk of recurring dysfunction without the need for invasive treatment.

When Does Scapular Winging Require Surgical Intervention?

Surgery for scapular winging may be recommended when rehabilitation and strengthening exercises fail to restore shoulder function or reduce pain. If you continue to experience weakness, visible shoulder blade protrusion, or limited arm movement after rehabilitation, your doctor will assess for possible nerve damage.

However, when diagnostic tests confirm long thoracic nerve involvement, your doctor may recommend these surgical procedures to restore muscle function and shoulder stability:

• Nerve decompression
• Nerve grafting
• Scapulothoracic Fusion

In more advanced cases where nerve recovery is not expected, your surgeon may recommend a pectoralis major tendon transfer to reposition the shoulder blade and restore functional movement. This procedure stabilizes the scapula by attaching part of the chest muscle to support the weakened serratus anterior. With guided rehabilitation and consistent follow-up, you can gradually regain shoulder strength, mobility, and control.

Can Posture Correctors or Braces Help Align Shoulder Blades?

Yes, posture correctors or braces can temporarily align your shoulder blades, but they are not a long-term solution. These assistive devices correct posture by guiding shoulder mechanics and reducing strain on surrounding muscles during routine activities. In fact, a 2020 study on the S3 spine-and-scapula brace found that wearing the brace increased posterior tilt by about 4° and upward rotation by 2° at rest.

However, these improvements gradually decrease once the brace is removed. For lasting shoulder alignment, your muscles must develop proper neuromuscular control to stabilize the shoulder blades during movement. Posture correctors can support this process, but they’re most effective when paired with strengthening and mobility exercises that retrain the scapular stabilizers to work efficiently, maintain balance, and relieve discomfort.

How Long Does It Take to Recover from a Winged Shoulder Blade?

Recovery from a winged shoulder blade typically takes several months to two years, depending on the underlying cause and the consistency of your treatment. If the issue results from mild nerve irritation or muscle weakness, recovery usually occurs within 6 to 12 months. However, if a long thoracic nerve injury or significant muscle tear is involved, it can take up to two years to regain full shoulder function.

In addition, your recovery progress depends on early diagnosis and consistent rehabilitation that focuses on activating the serratus anterior and trapezius muscles. As strength returns, posture correction and gradual resistance training help restore proper shoulder movement and balance. If these conservative methods fail to improve function after several months, your doctor may consider surgical options to achieve long-term stability.

Total Orthopedics & Sports Medicine Offers Surgical & Non-Surgical Treatments for Shoulder Blade Winging — Visit Us Now!

When you develop uneven shoulders or scapular winging, you may notice gradual discomfort and limited shoulder movement. With muscle weakness, your shoulder alignment begins to shift, adding strain to nearby muscles and joints. Over time, these imbalances can make everyday movements painful.

At Total Orthopedics & Sports Medicine, our specialists assess your muscle strength and shoulder movement to develop a precise treatment plan that supports long-term recovery. If you are seeking a second opinion, our team can review your prior imaging and medical records to provide an accurate diagnosis and a clear treatment plan. Call 855-321-6784 or 925 Clifton Ave, Suite 203,
Clifton, NJ 07013 to schedule your appointment.

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