Mid back pain originates in the thoracic spine, the 12 vertebrae between your neck and lower back. It’s less common than neck or low back pain because this section of your spine is reinforced by the rib cage, making it naturally more stable and less prone to injury. But that stability comes with a tradeoff: when something does go wrong here, the causes range from simple muscle strain to conditions that need prompt attention.
How the Mid Back Is Built (and Why It Still Hurts)
Your thoracic spine is unique. Each vertebra connects to a pair of ribs, and those ribs wrap around to attach to your breastbone in the front. This bony and cartilaginous cage acts like scaffolding, reducing range of motion in every direction and lowering the pressure on the discs between your vertebrae. The connection between your ribs and breastbone is the primary stabilizer of the entire region.
That built-in armor means disc herniations in the mid back are rare, accounting for less than 1% of all herniated discs. But it also means the muscles, joints, and soft tissues surrounding the thoracic spine take on different stresses than those in your more flexible neck and lower back. When those tissues get irritated, whether from posture, overuse, or an underlying condition, the pain can feel deep, achy, and hard to pinpoint.
Muscle Strain and Poor Posture
The most common reason for mid back pain is muscular. Sitting hunched over a desk, looking down at a phone, or driving for long stretches all place sustained load on the muscles between and around your shoulder blades. Over time, this creates a pattern of imbalance that clinicians call upper crossed syndrome: the muscles across your chest and at the tops of your shoulders become tight and overactive, while the muscles in your mid back (particularly the rhomboids and lower trapezius) become weak and stretched out.
The result is a postural cascade. Your shoulders round forward, your upper back curves more than it should (a condition called excessive kyphosis), and your shoulder blades start moving abnormally against your rib cage. People with this pattern typically report chronic upper back and neck pain, and they often notice their shoulders sit higher or more forward than they used to. The pain tends to be a burning or aching sensation between the shoulder blades that worsens throughout the workday and improves with movement or lying down.
Joint and Rib Problems
The joints where your ribs meet your spine can become irritated or inflamed, a condition sometimes called costovertebral joint dysfunction. This often follows a sudden twist, a coughing fit, or even sleeping in an awkward position. The pain is usually sharp and localized to one side of the spine, and it can wrap around your rib cage or get worse when you take a deep breath, sneeze, or rotate your trunk.
Facet joints, the small joints that connect one vertebra to the next, can also become stiff or inflamed in the thoracic spine. This tends to produce a deep ache near the center of the back that gets worse with prolonged sitting or when you arch backward.
Disc Herniations in the Thoracic Spine
Though uncommon, a thoracic disc herniation can cause significant symptoms. According to UCSF Health, the hallmarks include pain in the upper back, numbness or tingling that radiates from the back around the chest wall, leg weakness, and sometimes chest pain. Because the spinal canal is narrower in the thoracic region than in the lower back, even a small herniation here can put pressure on the spinal cord rather than just a single nerve root, which is why leg weakness and coordination problems are taken seriously in this area.
Scheuermann’s Disease
If your mid back pain started in adolescence and you’ve always had a rounded upper back, Scheuermann’s disease may be involved. This is a developmental condition where several vertebrae grow unevenly, becoming wedge-shaped instead of rectangular. The most widely used diagnostic criterion requires at least three consecutive vertebrae each wedged more than 5 degrees, along with irregular endplates visible on X-ray. The kyphosis (forward curvature) typically exceeds 40 degrees. In adults, this condition often causes stiffness and a dull ache in the mid back that worsens with prolonged standing or activity.
When Mid Back Pain Signals Something Else
Several organs sit near the thoracic spine, and problems with those organs can refer pain to the mid back. Kidney infections and kidney stones can cause flank pain that wraps into the mid back. Gallbladder inflammation often sends pain to the right shoulder blade area. Pancreatitis can produce deep mid-back pain that feels like it bores straight through from your abdomen.
One cause worth knowing about is thoracic aortic aneurysm. If the body’s largest artery tears or ruptures near the chest, the Mayo Clinic describes the pain as sharp and sudden in the upper back, spreading downward through the body, sometimes accompanied by pain in the chest, jaw, neck, or arms. This is a medical emergency. If you experience sudden, severe, tearing back pain unlike anything you’ve felt before, call emergency services.
Compression of the spinal cord in the thoracic region, known as myelopathy, produces its own set of warning signs. Johns Hopkins Medicine lists problems with walking, numbness, weakness spreading into one or both legs, and loss of bowel or bladder control as red flags. Abnormal reflexes in the legs are another sign that the spinal cord itself is involved rather than just local muscles or joints.
Ergonomic Fixes That Help
If your mid back pain is posture-related, adjusting your workspace is one of the most effective interventions. Position your monitor so the top of the screen sits at or slightly below eye level. Your eyes should look slightly downward when viewing the middle of the screen. Keep your keyboard at the same height as your elbows. These two adjustments alone reduce the tendency to hunch forward and load your mid back muscles unevenly.
If you sit for long periods, stand and move for a few minutes every 30 to 45 minutes. A standing desk helps some people, but standing in one position for hours creates its own problems. The key is variation: alternate between sitting, standing, and walking throughout the day.
Exercises for Mid Back Pain
Thoracic mobility exercises target the stiffness and muscle imbalances that drive most mid back pain. Physical therapists commonly recommend these movements, and they can be done at home with no equipment.
- Cat-cow (angry/happy cat): On all fours with hands under your shoulders and knees under your hips, breathe in and arch your back upward like an angry cat, then breathe out and let your belly drop as you stick your bottom out. This alternating flexion and extension mobilizes each thoracic segment.
- Supine rotation stretch: Lie on your back, let both knees roll to one side, then turn your head and arms to rest the opposite way. Hold for 30 seconds per side. This targets the rotational stiffness that builds up from sitting.
- Seated rotation: Sit on the edge of a chair with arms crossed over your chest, then slowly turn your upper body and head to look over one shoulder. Repeat on the other side.
- Crucifix stretch: Lie on your back with a rolled-up towel under your mid back and your head resting on the floor. Stretch your arms out to your sides with elbows straight and palms down. Hold for 30 seconds. This opens up the chest and counteracts the rounded posture that strains the mid back.
- Thread the needle: From all fours, slide one hand across your body through the gap between your other arm and knee, rotating your upper back toward the floor. Hold for 30 seconds per side.
Doing these once or twice a day, especially after long periods of sitting, addresses both the tightness in the chest and shoulders and the weakness in the mid back that together create most posture-related thoracic pain. Consistency matters more than intensity. A few minutes daily is more effective than a long session once a week.
What Persistent Mid Back Pain Could Mean
Most mid back pain resolves within a few weeks with movement, postural changes, and basic exercises. Pain that lasts longer than four to six weeks, gets progressively worse, or comes with numbness, weakness in the legs, unexplained weight loss, or changes in bladder or bowel function points toward something that needs imaging or further evaluation. Night pain that wakes you from sleep, pain that doesn’t change with position, and a history of cancer are also reasons to get it checked sooner rather than later.