The “back wing” is the shoulder blade, or scapula, a flat triangular bone that sits against your upper back on each side of the spine. Pain here is extremely common and usually stems from muscle strain, poor posture, or nerve irritation. Less often, it signals something happening with an internal organ. The cause depends a lot on where exactly it hurts, what makes it worse, and whether you have other symptoms.
Muscle Strain Between the Shoulder Blades
The most frequent reason your back wing hurts is a strained or spasming muscle. The rhomboid muscles run between your spine and the inner edge of each shoulder blade, and they’re easy to overwork. A rhomboid strain causes pain in the upper back between your shoulder blades and spine, often described as a knot or tightness. You may notice it more when you move your shoulders or even when you breathe deeply.
Common triggers include overhead activities (serving a tennis ball, reaching for high shelves), rowing motions, carrying a heavy backpack on one shoulder, and prolonged computer use with poor posture. If the pain started after one of these activities and feels like a tight, achy spot you can almost point to, a muscle strain is the most likely explanation.
How Posture Creates Shoulder Blade Pain
Hours spent hunched over a screen create a predictable pattern of muscle imbalances sometimes called upper crossed syndrome. The chest muscles, the muscles along the front and sides of your neck, and the upper trapezius (the muscle running from your neck to your shoulder tip) become tight and overactive. At the same time, the muscles between and below your shoulder blades, including the rhomboids, the middle and lower trapezius, and the serratus anterior (which wraps around your ribcage), become weak and overstretched.
This imbalance pulls your shoulders forward and rounds your upper back. The weakened muscles along your shoulder blades are now working harder than they should just to hold your posture, which leads to burning, aching pain between and around the wings. The fix isn’t just sitting up straighter for a few minutes. It requires strengthening those weak posterior muscles and stretching the tight ones in front, which takes consistent effort over weeks.
Pinched Nerves in the Neck
A pinched nerve in your cervical spine (neck) can send pain radiating into the shoulder blade area even though the problem originates higher up. The C6 nerve root is the most commonly compressed, followed by combined C5 and C6 involvement. When these nerves are irritated, typically by a herniated disc or bone spur narrowing the nerve’s exit channel, pain often radiates to the upper trapezius area, the deltoid region, and the outer arm.
This type of pain tends to be sharper or more electric than a muscle strain. It may worsen when you turn or tilt your head in certain directions. Numbness, tingling, or weakness in the arm or hand can accompany it. If your shoulder blade pain came on alongside neck stiffness and arm symptoms, a cervical nerve issue is worth investigating.
Scapular Winging
If your shoulder blade actually sticks out from your back more than it should, especially when you push against a wall or raise your arm, you may have scapular winging. This happens when the muscles that anchor the scapula flat against the ribcage stop working properly, almost always because of nerve damage.
The most common cause is injury to the long thoracic nerve, which controls the serratus anterior muscle. When this muscle is paralyzed or weakened, the inner border of the shoulder blade lifts away from the ribs (medial winging), and you’ll struggle to raise your arm above about 120 degrees. This nerve injury often comes from a stretch or blunt impact rather than a dramatic event. Damage to the spinal accessory nerve (affecting the trapezius) or the dorsal scapular nerve (affecting the rhomboids) can also cause winging, though the blade lifts outward instead of inward.
Scapular winging is less common than simple muscle strain, but if you can visibly see your shoulder blade protruding or feel it catching, it’s worth getting evaluated.
Snapping and Grinding Sensations
Some people feel or hear a pop, snap, or grinding when they move their shoulder. This is called snapping scapula syndrome, and it happens in the space between the shoulder blade and the ribcage. The hallmark signs are tenderness along the inner border of the scapula, a palpable or audible snap during overhead arm movement, and crepitus (a gritty grinding feeling).
This can develop from inflamed bursae (small fluid-filled cushions between the scapula and ribs), bony irregularities, or muscle imbalances that change how the blade glides. Initial treatment focuses on rest, anti-inflammatory medication, activity changes, and shoulder rehabilitation exercises. Corticosteroid injections into the inflamed bursa are an option if rehab alone isn’t enough.
Referred Pain From Internal Organs
Not all shoulder blade pain starts in the shoulder blade. Several organs can produce “referred pain” in this area, meaning the problem is elsewhere but the brain interprets the signal as coming from the back or shoulder. This happens because the nerves serving certain organs share pathways with nerves in the shoulder region, particularly through the phrenic nerve, which runs along the diaphragm.
Organs that can refer pain to the shoulder blade area include:
- Gallbladder: pain typically on the right side, often after fatty meals
- Heart: left-sided shoulder or back pain with chest tightness, sweating, or shortness of breath
- Lungs: lower lobe pneumonia can cause shoulder pain alongside cough and fever
- Pancreas: pancreatitis can refer pain to the shoulder region, usually with severe abdominal pain
- Spleen: a ruptured or injured spleen classically causes left shoulder pain (known as Kehr’s sign)
- Stomach: a perforated ulcer or even significant gastric distension after eating can irritate the diaphragm and cause shoulder pain
Referred pain from organs tends to feel deep and poorly localized rather than a sharp point you can press on. It often comes with other symptoms like nausea, fever, abdominal pain, or breathing difficulty. If your shoulder blade pain doesn’t behave like a muscle problem, doesn’t change with movement, or comes with any of these additional symptoms, it may not be a musculoskeletal issue at all.
Exercises That Help
For the majority of shoulder blade pain caused by muscle strain, posture, or mild dyskinesis (abnormal blade movement), a targeted exercise program is the primary treatment. The goal is restoring normal scapular positioning by strengthening the stabilizer muscles and stretching what’s tight.
Stretching the pectoralis minor (chest muscle) with shoulder horizontal abduction at different arm heights helps restore the scapula’s ability to tilt and rotate properly during arm elevation. For strengthening, the key muscles to target are the serratus anterior, lower trapezius, middle trapezius, and rhomboids. Effective exercises include wall push-ups with a “plus” (pushing your upper back toward the ceiling at the top), lawnmower pulls, and resisted scapular retraction (squeezing your shoulder blades together against a band).
Research on scapular rehabilitation programs shows that abnormal blade positioning, including mild winging and tipping, can resolve in as little as two months with consistent targeted exercise. The key word is consistent. These aren’t muscles most people think to train, so the imbalance tends to return without ongoing maintenance.
Symptoms That Need Urgent Attention
Most shoulder blade pain resolves on its own or with conservative treatment. However, certain combinations of symptoms signal something more serious. Shoulder blade or shoulder pain paired with chest tightness, difficulty breathing, and sweating may indicate a heart attack and requires emergency care. A shoulder blade that appears visibly deformed after a fall, complete inability to move your arm away from your body, sudden severe swelling, or intense pain after trauma all warrant an immediate trip to urgent care or the emergency room.