Common Causes of Pain Under the Shoulder Blade
Pain under the shoulder blade is a common symptom that may arise from a range of causes. These can include muscle strain, postural stress, nerve irritation, or referred pain from other structures. Identifying the likely source is important in guiding appropriate management.
Muscular Causes of Shoulder Blade Pain
Rhomboid Strain and Trigger Points
The rhomboid muscles (a pair of upper back muscles) connect the shoulder blade to the spine and help stabilise scapular movement. Repetitive arm use, prolonged desk work, or carrying heavy loads may place sustained stress on these muscles. When irritated or strained, they may cause aching or burning discomfort along the inner border of the shoulder blade, often worsened by arm movement or prolonged sitting.
Trigger points (tight, sensitive areas within muscle tissue) may also develop, particularly in individuals with prolonged postural strain. These can cause local tenderness and sometimes referred discomfort around the shoulder blade region.
Serratus Anterior Dysfunction
The serratus anterior muscle stabilises the shoulder blade against the ribcage during pushing and overhead movements.
When this muscle is weak or not functioning optimally, the shoulder blade may move less smoothly against the ribcage, which can contribute to discomfort or altered shoulder mechanics. This is sometimes more noticeable during repetitive overhead activity or in individuals with prolonged inactivity affecting shoulder stability.
Levator Scapulae Tension
It may become tight with prolonged stress, certain sleeping positions, or sustained forward-head posture (such as looking down at devices). This can contribute to discomfort along the upper inner border of the shoulder blade and may be associated with neck stiffness in some cases. The levator scapulae muscle runs from the upper neck to the upper inner border of the shoulder blade and assists with lifting and stabilising the scapula.
Spinal and Joint-Related Causes
Thoracic Spine Dysfunction
The mid-thoracic spine (particularly T2–T5 levels) may be associated with pain felt around or beneath the shoulder blade. This can present as a dull ache or, in some cases, sharper discomfort during deep breathing or certain movements. T4 syndrome is a recognised clinical presentation in which dysfunction in the upper thoracic spine may contribute to referred pain around the scapular region.
Less commonly, thoracic disc pathology may also cause persistent discomfort that radiates along the rib cage through the intercostal nerves.
Cervical Radiculopathy
Compression or irritation of nerve roots in the neck—most commonly at C5, C6, or C7—may cause pain that radiates into the shoulder blade region. Unlike isolated muscle strain, cervical radiculopathy may also be associated with neurological symptoms such as numbness, tingling, or weakness in the arm. Symptoms may be influenced by certain neck movements, which can increase nerve root irritation. Clinical examination tests such as the Spurling manoeuvre may be used by a specialist to assess whether nerve root compression is contributing to symptoms.
Acromioclavicular (AC) Joint Arthritis
The acromioclavicular (AC) joint connects the collarbone to the top of the shoulder blade. When affected by degeneration or previous injury, it may cause localised pain at the top of the shoulder, which can sometimes be felt around the shoulder blade or outer shoulder region. Symptoms are often more noticeable with cross-body movements or when lying on the affected side.
Nerve-Related Causes
Dorsal Scapular Nerve Entrapment
The dorsal scapular nerve supplies muscles that stabilise the shoulder blade, including the rhomboids and levator scapulae. In some cases, the nerve may become irritated or compressed as it passes through the neck region. This may contribute to deep, aching or burning pain along the inner border of the shoulder blade.
Some individuals may also experience subtle weakness in scapular retraction (pulling the shoulder blades together), although symptoms can overlap with muscular causes, making clinical assessment important. This condition may be under-recognised because it can resemble more common muscular pain patterns, and symptoms may persist despite standard soft tissue treatment.
Long Thoracic Nerve Injury
The long thoracic nerve supplies the serratus anterior muscle, which helps stabilise the shoulder blade against the rib cage. Injury to this nerve may result in scapular winging, where the shoulder blade becomes more prominent away from the rib cage, particularly during pushing movements or arm elevation.
This may occur following trauma, repetitive strain, or in some cases without a clear cause. Recovery varies between individuals, and while improvement may occur over time in some cases, others may experience persistent weakness or fatigue. Clinical evaluation is important to guide management and monitor progress.
Referred Pain from Internal Organs
Gallbladder and Liver Conditions
Pain around the right shoulder blade may sometimes be referred from conditions affecting the gallbladder, such as gallstones or gallbladder inflammation. This occurs because the nerves supplying the diaphragm share spinal cord pathways with nerves supplying the shoulder region, which can cause pain to be perceived around the shoulder blade. Symptoms may occur alongside nausea, bloating, abdominal discomfort, or pain after meals, particularly fatty foods.
Certain liver conditions may also occasionally cause discomfort felt around the right shoulder blade region. Unlike musculoskeletal pain, referred pain from internal organs is less likely to change significantly with shoulder movement or posture.
Cardiac Referral Patterns
Pain around the left shoulder blade can occasionally be associated with cardiac conditions, particularly when accompanied by symptoms such as chest discomfort, shortness of breath, jaw pain, dizziness, or symptoms triggered by exertion. Some individuals, especially women, may experience less typical symptom patterns.
New or unexplained shoulder blade pain accompanied by cardiovascular symptoms or significant risk factors warrants prompt medical assessment to exclude non-musculoskeletal causes.
Important Note
Seek medical attention if shoulder blade pain is associated with symptoms such as unexplained weight loss, night sweats, fever, persistent night pain, chest pain, breathlessness, or neurological symptoms such as arm weakness or numbness.
Assessment Approaches
Movement Analysis
Observing scapular motion during arm elevation can reveal movement abnormalities that may not be visible at rest. Scapular dyskinesis (altered shoulder blade position or movement pattern) may be associated with muscular imbalance, nerve-related dysfunction, or soft tissue tightness affecting shoulder blade control. The pattern of movement can help guide further assessment and management.
Assessing how neck movement affects shoulder blade pain may also help differentiate cervical spine involvement from local shoulder-related causes. Reproduction of symptoms with neck rotation, side bending, or compression may suggest a cervical contribution even when pain is felt mainly around the scapula.
Diagnostic Imaging
X-rays (imaging tests that use radiation to evaluate bones and joints) may help identify bony abnormalities, arthritic changes, or alignment issues involving the thoracic spine and shoulder girdle. While soft tissues are not directly visualised on X-rays, findings such as bone spurs or joint space narrowing may suggest chronic degenerative changes.
MRI (magnetic resonance imaging, which uses magnetic fields to create detailed soft tissue images) may be considered when clinical assessment suggests structural involvement affecting muscles, nerves, discs, or tendons. Cervical MRI can evaluate for conditions such as disc herniation or foraminal stenosis (narrowing around the nerve exit pathways), while shoulder MRI may assess structures including the rotator cuff and labrum that can contribute to scapular-region symptoms. Imaging is typically recommended based on clinical findings and is not required for all cases of shoulder blade pain.
Management Approaches
Targeted Exercise Prescription
Management commonly focuses on improving scapular control and addressing contributing muscular imbalances. Rehabilitation programmes may include strengthening of the lower and middle trapezius and serratus anterior muscles while improving flexibility and reducing tension in muscles such as the levator scapulae, pectoralis minor, and upper trapezius.
Exercise selection is usually tailored to the individual’s movement pattern, symptoms, and underlying cause rather than relying on a generic programme. A structured rehabilitation plan aims to improve movement mechanics, reduce strain on surrounding structures, and support long-term symptom management.
Manual Therapy Techniques
Manual therapy may include soft tissue techniques and thoracic spine mobilisation to address muscle tightness and restricted joint movement. Where nerve irritation is suspected, neural mobilisation techniques may sometimes be incorporated as part of a broader rehabilitation programme. These approaches are generally used alongside active exercise-based rehabilitation rather than as a standalone treatment.
Response to manual therapy varies between individuals, and treatment plans are typically adjusted according to symptoms, examination findings, and functional goals.
When to Seek Professional Help
Consider seeking medical evaluation if you experience:
- Shoulder blade pain persisting beyond two to three weeks without improvement
- Numbness, tingling, or weakness affecting the arm or hand
- Shoulder blade pain associated with chest discomfort, dizziness, or shortness of breath
- Visible winging of the shoulder blade away from the ribcage
- Night pain that regularly disrupts sleep
- Pain following a fall, accident, or other injury
- Fever, unexplained weight loss, or feeling generally unwell, alongside the pain
- Symptoms that interfere with daily activities, work, exercise, or sleep
Commonly Asked Questions
Why does my shoulder blade pain feel worse in the morning?
Morning stiffness can have several contributing factors. Joint-related issues, such as thoracic facet or costovertebral joint irritation, may cause stiffness that improves with movement. Myofascial (muscle-related) pain can also feel more pronounced after prolonged rest. In some cases, inflammatory conditions may contribute to early morning symptoms. Sleeping posture that places prolonged pressure or stretch on the affected area can further aggravate symptoms overnight.
Can poor posture really cause this much pain?
Sustained poor posture can place repeated strain on specific muscles and joints around the shoulder girdle. Over time, this may contribute to muscular imbalance, altered movement patterns, and increased load on surrounding tissues. While posture alone is not always the sole cause, it may be a contributing factor and can influence symptom persistence or recurrence. Addressing posture is often part of a broader rehabilitation approach.
How long does shoulder blade pain typically take to improve?
Recovery time depends on the underlying cause. Muscular strain may improve within a few weeks with appropriate management. Nerve-related conditions may take several weeks to months to recover, depending on severity. Degenerative or arthritic conditions may require longer-term management rather than complete resolution. Duration is also influenced by how long symptoms have been present prior to treatment.
Should I use heat or ice for shoulder blade pain?
Heat is generally helpful for muscle tightness and chronic discomfort by improving blood flow and reducing muscle tension. Ice may be more appropriate in the early phase of an acute injury or when inflammation is suspected, as it can help reduce pain and swelling. If uncertain, a short trial of either approach combined with gentle movement is often reasonable, but individual advice from a clinician is recommended for persistent symptoms.
Is it normal for neck problems to cause shoulder blade pain?
Yes. Conditions affecting the cervical spine (neck) can commonly refer pain to the shoulder blade region due to shared nerve pathways. In some cases, scapular pain may be primarily driven by cervical spine irritation rather than local shoulder structures. Identifying this relationship is important, as treatment may need to focus on the neck rather than the shoulder itself.
Next Steps
Shoulder blade pain can arise from a range of causes, including muscular strain, joint irritation, nerve-related conditions, or referred pain from other structures. Because each cause requires a different treatment approach, identifying the underlying source is an important first step in guiding appropriate management.
If symptoms persist despite rest or basic self-care, or if you experience numbness, tingling, arm weakness, or visible scapular winging, a structured clinical assessment is recommended. Our orthopaedic specialist can help determine the likely cause of your symptoms and recommend a targeted treatment plan based on your examination findings.
If shoulder blade pain is affecting your daily activities, sleep, or function, consider seeking medical evaluation to obtain a clear diagnosis and appropriate next steps.
