Pain in the middle of your back, the thoracic region between your shoulder blades and the bottom of your rib cage, usually comes from strained muscles or stiff joints tied to posture and repetitive activity. But the thoracic spine shares real estate with the heart, lungs, gallbladder, and pancreas, so mid-back pain occasionally signals something far more serious than a sore muscle. The list of possible causes is long enough that the location alone rarely tells you what is going on.
Muscle Strain and Myofascial Trigger Points
The most common reason people develop mid-back pain is straightforward: the muscles alongside the spine get overloaded, fatigued, or knotted. This happens easily when you sit at a desk for hours, hunch over a phone, carry a heavy backpack on one shoulder, or sleep in an awkward position. Over time, tight spots called myofascial trigger points can form in the muscles of the upper and mid-back, particularly the trapezius and rhomboids. These trigger points are essentially irritable knots that hurt when pressed and can refer pain to nearby areas. Neck and upper back pain are increasingly common among computer users because prolonged static postures and ergonomic strain create exactly the conditions that encourage trigger points to develop.1Journal of Health, Wellness and Community Research. Effect of Ischemic Pressure with Passive Stretching versus Dynamic Cupping in Alleviating Neck and Upper Back Pain Due to Myofascial Trigger Points in the Upper Trapezius of Computer Users
This kind of muscular pain tends to be achy and positional. It gets worse when you hold a particular posture and eases when you move around or lie down. It often responds to stretching, massage, heat, and taking breaks from whatever posture triggered it. If your mid-back pain started after a long work session, a weekend of yard work, or a new exercise routine, muscle strain is the most likely culprit.
Facet Joint Pain
Running down each side of your spine are small paired joints called facet joints. They guide movement and bear load, and like any joint, they can become inflamed, arthritic, or irritated. In people with chronic thoracic spine pain, facet joints turn out to be the source about 42% of the time, according to research using diagnostic nerve blocks to isolate the pain generator.2PubMed Central. Prevalence of facet joint pain in chronic spinal pain of cervical, thoracic, and lumbar regions That makes them one of the most frequent causes of persistent mid-back pain, though they rarely get the attention that disc problems receive.
Facet joint pain typically feels worse with extension (arching your back) or twisting, and it may be localized to one side. It can develop from wear-and-tear arthritis, a minor injury, or just the cumulative stress of daily movement. Because there is no simple imaging test that definitively says “this facet joint is the problem,” diagnosis often requires a targeted nerve block: if numbing the nerve that supplies a specific facet joint eliminates the pain, that joint is the source.3PubMed Central. Facet joint disorders: from diagnosis to treatment
Thoracic Disc Herniation
Disc herniations in the thoracic spine are far less common than in the neck or lower back. The rib cage stabilizes the thoracic vertebrae and limits their range of motion, which protects the discs somewhat. When a thoracic disc does herniate, it most often occurs in the lower thoracic spine, between roughly T8 and L1.4PubMed. Surgical treatment of thoracic disc herniation: an overview Symptoms can range from localized mid-back pain to pain that wraps around the chest wall following a rib, and in more severe cases, numbness or weakness in the legs if the disc presses on the spinal cord. Surgery is reserved for cases involving persistent pain that does not respond to conservative treatment, neurological deficits, or signs of spinal cord compression.
Vertebral Compression Fractures
If you are older or have osteoporosis, a vertebral compression fracture is a cause worth considering. These fractures happen when a weakened vertebral body partially collapses under normal or minimal stress. Sometimes the triggering event is as minor as bending to pick something up or coughing hard. The hallmark is a sudden onset of back pain that worsens with standing or walking and eases when you lie on your back.5PubMed Central. Vertebral compression fractures: Still an unpredictable aspect of osteoporosis The acute pain typically lasts about four to six weeks as the bone heals, but some people end up with a chronic ache concentrated at the fracture site because the altered posture strains surrounding ligaments.
Thoracic compression fractures can also cause pain that radiates around the rib cage. In a small study of elderly patients who developed rib-area pain after thoracic compression fractures, about half had their costal pain improve after a vertebroplasty procedure that stabilized the fractured vertebra.6PubMed Central. The Effect of Vertebroplasty on Costal Pain Related to Osteoporotic Thoracic Compression Fractures in Elderly Patients The remaining patients needed additional treatment with anti-inflammatory drugs or nerve blocks. The connection between a fractured vertebra and rib pain is worth knowing because it can lead people to think they have a separate rib or chest-wall problem when the vertebra is actually the source.
Costovertebral Joint Problems
Each rib attaches to the thoracic spine at a costovertebral joint, and these joints can become inflamed or arthritic. This is a cause of mid-back pain that is easy to overlook because the joints are small and not routinely examined on standard imaging. Pain from a costovertebral joint typically sits right alongside the spine and may flare with deep breathing, twisting, or coughing, since rib motion stresses the joint.
Costovertebral joint arthritis becomes especially common in people with ankylosing spondylitis, a chronic inflammatory condition that targets the spine. In patients with established ankylosing spondylitis, imaging has detected costovertebral joint arthritis in over 96% of cases, compared with roughly 7% in control subjects.7PubMed Central. Erosive costovertebral joint arthritis as a novel feature of ankylosing spondylitis But you do not need an autoimmune condition to develop irritation in these joints. Repetitive overhead activity, a fall, or even a prolonged bout of coughing can inflame them.
Ankylosing Spondylitis and Inflammatory Back Pain
Ankylosing spondylitis is an inflammatory disease that primarily affects the spine, causing a pattern of back pain that is distinctly different from the usual mechanical ache. It typically starts in the lower back and sacroiliac joints but can involve the thoracic spine, producing mid-back stiffness and pain. The key distinguishing features are that the pain and stiffness tend to be worst in the morning or after long periods of rest, improve with movement and exercise, and often begin before the age of 40.8The Lancet. Ankylosing spondylitis
If your mid-back pain wakes you in the second half of the night, takes more than 30 minutes to loosen up each morning, and has been going on for more than three months, those are patterns that should prompt a conversation with your doctor about inflammatory causes. Blood tests and imaging of the sacroiliac joints can help confirm or rule out the diagnosis. Left untreated, ankylosing spondylitis can eventually fuse segments of the spine, permanently restricting mobility.
Scheuermann’s Disease
In adolescents and young adults, Scheuermann’s disease is the most common cause of a rigid, exaggerated forward curvature (kyphosis) in the thoracic spine.9PubMed. Scheuermann’s Disease It develops during growth spurts when several adjacent vertebrae wedge slightly forward, producing a rounded upper back that does not straighten out with effort. Many cases are mild and cause only cosmetic concern, but moderate to severe curves can produce chronic mid-back aching, particularly after prolonged standing or activity.
Most people with Scheuermann’s disease are managed with physical therapy, core strengthening, and activity modification. Surgery is rarely needed and is typically reserved for severe curves exceeding about 75 degrees that continue to progress, cause persistent pain unresponsive to conservative care, or produce neurological symptoms.10PubMed. Scheuermann’s disease
Shingles and Nerve-Related Pain
Herpes zoster, or shingles, is a reactivation of the chickenpox virus in a nerve root. The thoracic dermatomes are the most common site, so a mid-back rash that follows a band from spine to chest wall is classic. What catches people off guard is that pain often precedes the rash by several days. During that pre-rash phase, the burning, stabbing, or throbbing pain in the mid-back has no visible explanation and can be mistaken for a muscle strain, a heart problem, or even a kidney issue depending on the location.
Shingles pain reflects both normal tissue inflammation and direct nerve injury. In some patients, the nerve damage persists long after the rash heals, producing a condition called postherpetic neuralgia that can last months or years. Research using skin biopsies has linked this persistent pain to the severity of nerve-fiber loss in the affected area, and autopsy studies have found shrinkage of the corresponding segment of the spinal cord, highlighting that the nervous system itself is damaged, not just the skin.11PubMed Central. Mechanisms of pain and itch caused by herpes zoster (shingles)
When the Pain Is Not Coming from the Spine at All
Some of the most important causes of mid-back pain originate in organs that happen to sit near the thoracic spine. These “referred pain” patterns can be misleading because the back may hurt intensely while the real problem is elsewhere.
Gallbladder Disease
Gallstones are a classic source of referred mid-back pain. The pain typically centers in the upper-right abdomen but radiates to the upper back or right shoulder blade in roughly 60% of cases.12PubMed Central. Cholelithiasis Presented as Chronic Right Back Pain It tends to hit in the late evening or at night, often after a fatty meal, and may be accompanied by nausea or vomiting. In some people, the back pain is actually more prominent than the abdominal pain, which can send them to an orthopedic or spine clinic rather than a gastroenterologist. When gallbladder inflammation becomes severe or the tissue begins to die, as in gangrenous cholecystitis, the pain can be sudden and intense, radiating to both the back and the shoulder.13American Journal of Pathology & Research. Gangrenous Cholecystitis: A Case Report from Ignace Deen’s Department of General Surgery
Pancreatitis
The pancreas sits behind the stomach, directly in front of the spine, so inflammation there often causes pain that bores straight through to the mid-back. Acute pancreatitis usually comes on suddenly with severe upper abdominal pain that radiates to the back and may improve slightly when you lean forward. Chronic pancreatitis produces a more complex pain picture. Research shows that the pain processing system itself becomes rewired over time, resembling what is seen in neuropathic and chronic pain disorders, which helps explain why some patients continue to have significant pain even after procedures designed to relieve ductal pressure.14PubMed Central. Pain and chronic pancreatitis: a complex interplay of multiple mechanisms
Aortic Dissection
This is the one that should genuinely alarm you. An aortic dissection occurs when the wall of the aorta tears, allowing blood to force its way between the layers. Type B dissections, which involve the descending aorta, can present primarily as severe mid-back pain. A published case report described a 40-year-old man who first went to a spine clinic for worsening mid-back pain; his condition had deteriorated over 24 hours before the correct diagnosis of Stanford type B aortic dissection was made.15PubMed Central. Misdiagnosed mid-back pain by Stanford type B aortic dissection masquerading as musculoskeletal origin The pain is typically described as tearing or ripping, comes on suddenly, and may migrate as the dissection extends. If you have sudden, severe mid-back pain with no obvious muscular cause, especially if you also have high blood pressure, uneven pulses in your arms, or feel faint, get emergency help immediately.
Pulmonary Embolism
A blood clot that lodges in the lung can cause back pain, usually with a sharp, pleuritic quality that worsens with breathing. One case report documented a patient who developed left-sided back and shoulder pain 13 days after abdominal surgery and was subsequently diagnosed with a pulmonary embolism.16PubMed Central. Pulmonary Embolism Presenting As Shoulder and Back Pain: A Case Report Risk factors include recent surgery, prolonged immobility, use of hormonal contraceptives, and a history of blood clots. Like aortic dissection, pulmonary embolism is a medical emergency.
Red Flags That Warrant Urgent Evaluation
Most mid-back pain is benign and self-limiting, but certain features should prompt you to see a doctor promptly rather than riding it out. A systematic review of thoracolumbar pain identified a long list of warning signs that raise suspicion for serious underlying conditions.17PubMed. The diagnostic value of Red Flags in thoracolumbar pain: a systematic review The ones most relevant to mid-back pain include:
- Night pain: pain that wakes you from sleep and is not relieved by any position change, which can suggest infection or tumor.
- Neurological signs: new weakness in your legs, difficulty walking, numbness in the groin or inner thighs (saddle anesthesia), or loss of bladder or bowel control.
- Unintentional weight loss: losing weight without trying can signal malignancy.
- History of cancer: back pain in someone with a known cancer history should be evaluated for spinal metastasis.
- Fever or recent infection: these raise concern for a spinal infection such as discitis or an epidural abscess.
- Trauma: even minor trauma in older adults or anyone on corticosteroids should prompt evaluation for fracture.
- Cardiovascular symptoms: sweating, rapid heart rate, low blood pressure, or shortness of breath alongside mid-back pain suggest a cardiac or vascular cause.
None of these red flags individually prove a serious diagnosis, but their presence changes the urgency of evaluation. A combination of two or more in someone with new mid-back pain should lower your threshold for seeking care quickly.
The Imaging Puzzle
One frustrating aspect of mid-back pain is that imaging findings do not always match symptoms. A systematic review of thoracic MRI studies found enormous variability in how common degenerative changes appeared: the reported prevalence of thoracic disc degeneration ranged from less than 1% to 89%, and vertebral endplate changes ranged from 0% to 82%, depending on how degeneration was defined and who was scanned.18PubMed Central. Prevalence of thoracic degenerative MRI findings and association with pain and disability: a systematic review Only a small number of studies have actually tested whether the MRI abnormalities correlate with the patient’s pain, and the evidence linking specific thoracic MRI findings to symptoms remains thin.
This means that if you get an MRI for mid-back pain, it may show disc bulges, endplate changes, or mild arthritis that look abnormal but are not necessarily causing your symptoms. Many people with no pain at all have these same findings on imaging. Your doctor should interpret the scan in the context of your symptoms and physical exam, not treat the MRI in isolation. Overreliance on imaging is how people end up being told they have a “bad disc” when their pain is actually coming from a facet joint, a muscle, or a completely non-spinal source.
Mid-Back Pain During Pregnancy
About half of all pregnant women experience back pain at some point during pregnancy, and a substantial number receive little or no guidance from their healthcare providers about managing it.19PubMed Central. Back pain/discomfort in pregnancy: invisible and forgotten While lower back pain gets most of the attention, mid-back and upper-back pain are also common during pregnancy. The expanding uterus shifts the center of gravity forward, which increases the thoracic kyphosis and places extra strain on the muscles and joints between the shoulder blades. Hormonal changes that loosen ligaments throughout the body contribute to joint instability in the spine as well. For most pregnant women, the pain resolves after delivery, but physical therapy, gentle strengthening exercises, and attention to posture can make a meaningful difference in the meantime.
How Posture and Sitting Behavior Contribute
For the majority of people whose mid-back pain is musculoskeletal, the way you sit and move during the day plays a big role. A scoping review of office workers found that longer sitting time, poor sitting posture, fewer breaks, and more static (uninterrupted) sitting were all associated with back pain, with the strongest evidence supporting sitting behavior, meaning how often you shift position and take breaks, as a key factor.20PubMed. Low back pain and sitting time, posture and behavior in office workers: A scoping review
Lumbar support helps maintain the natural curve of your lower spine, but its benefit extends to the mid-back as well. When your lower spine collapses into a slouch, the thoracic spine compensates by rounding further forward, loading the mid-back muscles and joints. Research on office-worker interventions found that lumbar support enhanced the benefits of regularly shifting posture, likely because maintaining the lower spine’s curve reduces the compensatory strain higher up.21PubMed Central. Characteristics of office workers who benefit most from interventions for preventing neck and low back pain: a moderation analysis The practical takeaway is that a chair with decent lumbar support combined with frequent position changes, even small ones like shifting your weight or standing briefly every 30 minutes, does more to protect your mid-back than either intervention alone.
Mid-Back Pain in Adolescents
Teenagers are not immune. Mid-back pain in adolescents is common enough that researchers have tried to identify the physical risk factors behind it. A systematic review found that certain postural patterns, including an exaggerated forward head position and a sway-back stance, were associated with neck and mid-back pain in this age group.22PubMed Central. Physical risk factors for adolescent neck and mid back pain: a systematic review Heavy backpacks, increased screen time, and reduced physical activity are the usual suspects, though the research acknowledged that inconsistent definitions of mid-back pain across studies made it difficult to draw firm conclusions.
In adolescents with persistent or worsening mid-back pain, Scheuermann’s disease should be considered, especially if there is a visible rounding of the upper back that does not correct when the teenager tries to stand up straight. Most cases are mild, but early identification allows for monitoring and intervention before skeletal maturity, when bracing can still influence curve progression.