Upper back pain most often comes from muscle strain, poor posture, or stress, not from a problem with the spine itself. About 26% of adults experience thoracic spine pain at some point, making it roughly half as common as lower back pain. The upper back (the thoracic region, running from the base of your neck to the bottom of your rib cage) is more stable than your neck or lower back because the ribs attach to it, so disc herniations and other structural problems are rare here. That stability, though, doesn’t protect the muscles and soft tissues draped over it.
Muscle Strain and Overuse
The trapezius muscles are two large, diamond-shaped muscles that span most of your upper back and connect to your neck and shoulders. Along with the rhomboids (the smaller muscles between your shoulder blades), they do the heavy lifting when you pull, carry, or hold your arms in front of you. Straining these muscles through sports, repetitive motions, or even a single awkward lift can create micro-tears in the muscle fibers that lead to localized pain, stiffness, and tenderness.
This kind of pain typically feels like a dull ache or tightness in a specific area. It usually gets better with rest and worse with the movement that caused it. Most muscle strains heal within a few days to a couple of weeks without any treatment beyond gentle stretching, ice, and avoiding the activity that triggered it.
Posture and Screen Time
Your head weighs about 10 to 12 pounds when balanced directly over your spine. Tilt it forward 15 degrees to look at your phone, and the effective load on your neck and upper back jumps to roughly 27 pounds. At 45 degrees, which is a common texting angle, it reaches about 49 pounds. At a full 60-degree tilt, your upper back muscles are working against 60 pounds of force.
Holding that position for hours each day forces the trapezius, rhomboids, and surrounding tissues to work constantly to keep your head from falling further forward. Over time, this sustained load irritates the small joints in the upper spine and creates painful trigger points in the muscles. It also flattens the natural curve of your neck and pushes the upper back into a more rounded position, which redistributes mechanical stress in ways the spine isn’t designed for. Researchers have found that this pattern can accelerate spinal degeneration at an earlier age than would otherwise be expected.
Slouching at a desk, driving hunched over the steering wheel, or sinking into a couch all produce similar effects. The common thread is that the muscles get pulled out of their usual alignment and held there for long stretches, creating chronic tension rather than a single injury.
Stress and Muscle Tension
Emotional stress has a direct physical pathway to upper back pain. When you’re stressed, your body releases adrenaline as part of the fight-or-flight response, which increases blood pressure and causes the muscles around your spine to tense and spasm. Cortisol, the other major stress hormone, compounds the problem over time: chronically elevated levels contribute to muscle mass loss and fat accumulation, both of which change how your body supports itself.
The trapezius muscles are especially prone to stress-related tightening. If you’ve ever noticed your shoulders creeping up toward your ears during a stressful workday, that’s your traps contracting. Sustained tension like this can produce the same deep, aching pain as a physical strain, and it often lingers because the source of the stress doesn’t go away when you lie down.
Myofascial Pain and Trigger Points
When muscle tension or strain becomes persistent, it can develop into myofascial pain syndrome. This involves tight bands of muscle fibers that form tender knots, called trigger points, which cause deep, aching pain that doesn’t go away on its own or progressively worsens. Pressing on one of these knots often reproduces the pain, and the pain can radiate outward to nearby areas, including the shoulders, neck, and head.
People with myofascial pain in the upper back frequently report trouble sleeping, general fatigue, and a feeling of being unwell beyond just the pain itself. The condition is common in people who sit for long periods, carry tension in their shoulders, or have had a previous injury that never fully resolved. Treatment typically involves hands-on therapy to release the trigger points, stretching, and addressing whatever postural or stress-related habit created them.
Joint Degeneration
The spine has small paired joints along the back of each vertebra called facet joints. These joints allow you to bend, twist, and extend your back. Like any joint, they can wear down over time, a condition called facet arthropathy. The cartilage inside the joint thins, the surfaces become rougher, and inflammation sets in.
Facet joint pain in the upper back feels like an aching or sharp pain near the spine that gets worse when you arch backward or twist. You may notice stiffness first thing in the morning or after sitting for a long time, and the area is often tender to the touch. The pain can also refer to nearby areas, so it sometimes shows up in the shoulders or between the shoulder blades even though the joint itself is along the spine. This type of pain tends to come on gradually over months or years and is more common after middle age.
Disc Problems in the Upper Back
Herniated discs in the thoracic spine account for less than 1% of all disc herniations. The rib cage braces this section of the spine and limits the range of motion that typically leads to disc injuries in the neck and lower back. When a thoracic disc herniation does occur, it can cause localized pain, and in rare cases, numbness or weakness if the disc presses on a nerve or the spinal cord. But for the vast majority of people with upper back pain, disc disease is not the cause.
Compression Fractures
In people with osteoporosis or significantly weakened bones, a vertebra in the upper back can partially collapse under normal body weight or a minor fall. These compression fractures cause sudden back pain that improves with rest and worsens with movement, along with tenderness directly over the fracture site. A hallmark sign is a noticeable loss of height over time, since each collapsed vertebra shortens the spine slightly. You may also feel muscle spasms around the fracture or tingling if the fracture pinches a nerve.
Compression fractures are most common in postmenopausal women and older adults, though they can occur in anyone with reduced bone density. Some fractures are painful enough to limit walking, bending, and twisting. Others are mild and go undiagnosed until they show up on an X-ray taken for another reason.
Pain Referred From Internal Organs
Sometimes upper back pain has nothing to do with the back itself. Several internal organs share nerve pathways with the thoracic spine, so problems in those organs can register as pain between or around the shoulder blades.
- Heart: Angina, or reduced blood flow to the heart muscle, can produce pain in the upper back, particularly the left side.
- Esophagus: Spasms in the esophagus can cause a twisting pain directly between the shoulder blades.
- Lungs: Conditions like pleurisy (inflammation of the lining around the lungs) cause back pain that worsens with breathing.
- Kidneys: Kidney infections or stones typically affect the lower back, but pain can extend into the bottom of the upper back region as well.
Referred pain from organs typically doesn’t change with movement or posture the way musculoskeletal pain does. If your upper back pain comes with chest tightness, shortness of breath, pain when breathing, or changes in urination, those are signs the source may be internal rather than structural.
Red Flags Worth Knowing
Most upper back pain is uncomfortable but not dangerous. A small number of cases, however, signal something that needs prompt attention. Warning signs include pain that doesn’t improve with rest or over-the-counter pain relief, unexplained weight loss, night sweats, fever, or a history of cancer. Bowel or bladder changes, progressive weakness in both legs, or numbness in the groin area can indicate pressure on the spinal cord and require emergency evaluation. New upper back pain after a fall or injury, especially in anyone over 50 or with known osteoporosis, warrants imaging to rule out a fracture.