Upper back pain most often comes from strained muscles or stiff joints in the thoracic spine, the twelve vertebrae between your neck and lower back. Unlike lower back pain, which is overwhelmingly muscular, upper back pain has a wider range of possible causes, from poor desk posture to stress to, in uncommon cases, problems with internal organs. Understanding the pattern of your pain, when it started, and what makes it better or worse can help you narrow down what’s going on.
Muscle Strain and Joint Stiffness
The most common reason for upper back pain is simple overuse or strain of the muscles and ligaments that support the thoracic spine. This includes muscle strains from lifting something awkwardly, sleeping in an odd position, or repetitive movements that fatigue the muscles between your shoulder blades. Ligament sprains, gradual wear and tear of tissue, and imbalances between the muscles that support the spine all fall into this category. If your pain started after a specific activity, feels like a dull ache or tightness, and improves with gentle movement, a muscular cause is the most likely explanation.
Joint dysfunction in the thoracic spine can also produce a stiff, achy sensation. The small joints where each rib connects to the vertebrae can become irritated from prolonged sitting, sudden twisting, or even a forceful cough. This type of pain often feels sharp when you rotate your torso or take a deep breath, then settles into a background soreness.
How Stress Creates Upper Back Pain
Psychological stress is one of the most underrecognized drivers of upper back pain. When you’re stressed, your body releases adrenaline as part of the fight-or-flight response. That hormonal surge increases blood pressure and causes the muscles around your spine to tense and spasm. The practical result: your shoulders hunch up, and you develop pain throughout the upper and middle back.
This isn’t just momentary tension. If you’re under chronic stress, those muscles stay partially contracted for hours or days at a time. The trapezius, the large diamond-shaped muscle spanning your upper back and neck, and the levator scapulae, which runs from your neck to the top of each shoulder blade, are particularly prone to this pattern. People who carry stress in their shoulders often describe a burning or aching sensation between the shoulder blades that worsens through the day and improves somewhat on weekends or vacations.
Posture and Desk Setup
Spending hours hunched over a laptop or phone puts sustained load on the muscles and joints of your upper back. Over time, the chest muscles shorten, the upper back rounds forward, and the muscles between your shoulder blades fatigue from constantly fighting gravity. This is one of the most common patterns in people whose pain builds gradually without a clear injury.
If you work at a desk, a few specific adjustments can make a meaningful difference. Place your monitor directly in front of you, about an arm’s length away (20 to 40 inches from your face), with the top of the screen at or slightly below eye level. If you wear bifocals, lower the monitor an additional 1 to 2 inches for comfortable viewing. Your chair should support the natural curve of your spine, and if it has armrests, position them so your arms rest gently with your elbows close to your body and your shoulders relaxed rather than hiked up. When your shoulders are creeping toward your ears for eight hours a day, it’s only a matter of time before the upper back protests.
Disc Problems in the Upper Back
Herniated discs in the thoracic spine are rare, accounting for less than 1% of all disc herniations. The thoracic spine is more rigid than the neck or lower back because it’s anchored to the ribcage, which limits the kind of movement that typically damages discs. When a thoracic disc herniation does occur, it often causes a distinctive symptom: a band-like sensation around the chest, as though a strap is being tightened at the level of the affected disc. About 76% of people with symptomatic thoracic disc herniations report midback pain, and roughly 61% experience some motor or sensory changes like numbness, tingling, or weakness.
When the Pain Comes From Somewhere Else
Your upper back shares nerve pathways with several internal organs, which means problems in those organs can show up as back pain. This is called referred pain, and it happens because your brain misinterprets signals traveling along the same nerve branches.
A spasm in your esophagus can produce a twisting pain right between the shoulder blades. Angina from reduced blood flow to the heart can feel like back pain. Lung conditions, including inflammation of the lining around the lungs, can cause back pain that worsens with breathing. Kidney problems typically cause lower back pain but can sometimes reach the bottom of the upper back. A sudden, sharp pain between the shoulder blades can, in rare cases, signal a ruptured spleen.
Referred pain from organs tends to behave differently from muscular pain. It often doesn’t change with movement or position, may come with other symptoms (nausea, shortness of breath, fever), and can feel deeper or harder to pinpoint than a sore muscle. If your upper back pain doesn’t respond to rest, stretching, or position changes, and especially if it comes with chest tightness, difficulty breathing, or unexplained sweating, it warrants prompt medical attention.
Inflammatory Conditions
Ankylosing spondylitis is a chronic inflammatory condition that primarily affects the spine. It typically starts with lower back and hip pain and stiffness, but over time the symptoms can progress upward into the thoracic spine. A hallmark feature: the pain worsens during rest or inactivity, which is the opposite of most muscular injuries. People with this condition often notice more pain in the middle of the night or after prolonged sitting, and find that movement and exercise actually improve symptoms.
In severe cases, ongoing inflammation causes the vertebrae to gradually fuse together, leading to a rigid, less flexible spine. When the joints connecting the ribs are involved, it can become difficult to take deep breaths. The condition runs in flares and remissions, and some people also develop eye inflammation, psoriasis, or inflammatory bowel disease. A specific gene called HLA-B27 significantly increases the risk, and if you have a family history of the condition alongside worsening morning stiffness in your back, it’s worth raising with your doctor.
Red Flags That Need Attention
Most upper back pain resolves on its own or with simple self-care. But certain patterns suggest something more serious. The American College of Radiology identifies several red flags that warrant imaging and further evaluation: a history of significant trauma, signs of spinal cord compression (such as weakness in the legs, difficulty with balance, or bladder dysfunction), known cancer or immunosuppression, unexplained weight loss, or fever alongside back pain.
People over 65 or those with osteoporosis or a history of long-term steroid use also deserve earlier investigation, since compression fractures in the thoracic vertebrae can occur with minimal force and may not produce the dramatic injury you’d expect. If your pain is progressively worsening over weeks rather than improving, or if you develop numbness, tingling, or weakness radiating into your chest or legs, those are signals to get evaluated sooner rather than later.
Exercises That Help
For muscular upper back pain, targeted mobility exercises can relieve stiffness and reduce the tendency for muscles to tighten back up. A few movements are particularly effective for the thoracic spine.
The cat-cow stretch is a good starting point. Begin on your hands and knees with your knees under your hips and hands under your shoulders. Inhale as you arch your back and press your chest toward the floor, lifting your head. Then exhale as you round your back into a C-curve, pushing your shoulder blades apart. Cycle through this 10 times. It gently mobilizes the entire thoracic spine and often provides immediate relief from stiffness.
The open book stretch targets rotation, which is commonly restricted in people with upper back pain. Lie on your left side with your knees bent and both arms straight out in front of you, palms touching. Slowly rotate your top arm open like a book cover, following it with your eyes, until it reaches the other side. Hold for a breath, then return. Repeat on both sides.
As your pain improves, more integrated movements like bird dogs (extending opposite arm and leg from a hands-and-knees position) and standing wood chops build dynamic control and coordination through the thoracic spine. The goal is to progressively challenge your upper back to move through its full range rather than staying locked in one position all day. Consistency matters more than intensity: five minutes of daily mobility work tends to produce better results than one long session per week.