Pain under the shoulder blade is most often caused by strained or overworked muscles in the upper back, but it can also signal a pinched nerve in the neck, inflamed tissue beneath the shoulder blade itself, or, less commonly, a problem with an internal organ. The location, quality, and timing of the pain all help narrow down what’s going on.
Muscle Strain and Trigger Points
The most common reason for pain under the shoulder blade is irritation of the muscles that attach along the inner border of the scapula. Two muscles in particular are responsible: the rhomboids, which pull your shoulder blades together, and the levator scapulae, which runs from the top of the shoulder blade up to the side of your neck. These two muscles are physically connected by a bridge of connective tissue at the upper corner of the scapula, which means tension in one can easily pull on the other. That’s why pain in this area often radiates up into the neck or the base of the skull.
Trigger points, or tight knots within these muscles, develop from repetitive strain, poor posture, or sudden overuse. They create a deep, aching pain that can feel like it’s coming from underneath the bone rather than from the muscle itself. You might notice it worsens when you reach overhead, turn your head, or sit for long periods.
How Posture Creates Chronic Pain Here
If your shoulder blade pain keeps coming back, posture is a likely contributor. A well-documented pattern called upper crossed syndrome describes exactly what happens: the muscles across the front of your chest and the ones running from your shoulder blade to your neck become chronically tight, while the muscles in the middle of your back and the lower part of the shoulder blade grow weak. The result is rounded shoulders, a forward head position, and increased curvature of the upper spine.
This imbalance forces the muscles along the inner edge of your shoulder blade to work overtime just to hold you upright. Over weeks and months, that constant low-grade strain produces the familiar burning or aching sensation between the spine and the shoulder blade. Desk work, phone use, and driving are the usual culprits because they all lock the body into that same forward-rounded position for hours at a time.
Correcting this involves strengthening the weak muscles (the ones between and below your shoulder blades) while stretching the tight ones across your chest and the sides of your neck. Exercises like rows, wall slides, and chin tucks target the right areas. The discomfort typically improves within a few weeks of consistent work, though it can take longer if the pattern has been established for years.
A Pinched Nerve in the Neck
Here’s something most people don’t expect: shoulder blade pain is frequently the first sign of a compressed nerve in the cervical spine. In about 70% of cervical radiculopathy cases, neck or scapular pain shows up weeks before any symptoms appear in the arm or hand. That means you can have a pinched nerve in your neck and feel it almost entirely under your shoulder blade, with no obvious neck pain at all.
The specific location of the pain offers clues about which nerve is involved. Compression of the C5 or C6 nerve roots tends to cause pain above and along the top of the shoulder blade, while C7 or C8 involvement is more likely to produce pain at or below the shoulder blade, closer to the inner border. C7 is the most commonly implicated nerve root. In one study, 56% of patients with C7 radiculopathy reported scapular pain as part of their symptoms.
Nerve-related shoulder blade pain often has a sharper, more electric quality compared to the dull ache of a muscle strain. It may worsen when you tilt or turn your head in certain directions. Over time, you might notice tingling, numbness, or weakness spreading into the arm or fingers. If those symptoms develop, the neck is almost certainly involved.
Bursitis and Snapping Scapula
Between your shoulder blade and your ribcage sit small fluid-filled sacs called bursae that help the bone glide smoothly over muscle. When these become inflamed, the condition is called scapulothoracic bursitis. The most common spot for this is along the upper inner border of the shoulder blade, though the lower inner border is also affected in some cases.
The hallmark symptom is pain that worsens with activity, particularly with overhead movements or pushing motions. Some people also notice grinding, popping, or thumping sensations when they move their shoulder blade, a condition sometimes called snapping scapula syndrome. The sounds from bursitis tend to be subtle, more of a soft crepitus than a loud pop. Others have significant pain with no noise at all. This condition is more common in people who do repetitive overhead work or sports like swimming and throwing.
When the Pain Isn’t From the Back at All
Several internal organs can refer pain to the shoulder blade region, and these causes are important to recognize even though they’re less common.
- Gallbladder: Gallstones and gallbladder inflammation classically refer pain to the tip of the right shoulder blade. In one study, over half of patients with gallstones had tenderness at this spot. The pain typically flares after fatty meals and may come with nausea or abdominal discomfort in the upper right side.
- Heart: Pain between the shoulder blades, particularly on the left side, can be a symptom of a heart attack, especially in women. If shoulder blade pain comes with chest tightness, difficulty breathing, or sweating, call emergency services immediately.
- Lungs: Infections like pneumonia, blood clots in the lung, or tumors near the top of the lung can all produce shoulder blade pain. These usually come with other symptoms like cough, shortness of breath, or unexplained weight loss.
The key distinction is that organ-related pain doesn’t change when you move your shoulder or press on the area. Musculoskeletal pain almost always gets better or worse with certain positions and movements. Pain that is constant regardless of position, or that comes with symptoms involving breathing, digestion, or your chest, points toward an internal cause.
What Recovery Looks Like
For the most common causes (muscle strain, trigger points, and postural overload) the pain typically resolves within two to four weeks with rest, ice or heat, gentle stretching, and gradual strengthening. More severe strains or ligament injuries can take a few months. Most people manage recovery at home without needing imaging or specialized treatment.
If the pain doesn’t improve after a few weeks of self-care, or if it started without any obvious cause, a physical exam can help identify whether the issue is muscular, postural, nerve-related, or something else. Nerve compression from the cervical spine often responds well to physical therapy, though it may take six to twelve weeks to see meaningful improvement. Scapulothoracic bursitis sometimes requires targeted anti-inflammatory treatment if rest alone isn’t enough.
Pay attention to what makes the pain better or worse. Pain that increases with slouching and eases with movement is almost certainly postural. Pain that flares when you turn your head or that sends tingling into your arm suggests a nerve. Pain that has no relationship to movement at all, especially if paired with other symptoms, warrants a prompt medical evaluation.