What Causes a Sore Middle Back, and How Do You Find Out?
A sore middle back usually comes from muscle strain, poor posture or stiffness in the thoracic vertebrae. Less often, it is linked to joint wear, a wedge fracture or referred pain from the rib cage. The thoracic spine connects the neck above and the lower back below. So a problem here often affects other areas too.
Key points
- Middle back pain sits between the base of the neck and the bottom of the rib cage. This area covers the 12 thoracic vertebrae.
- Posture, desk work and muscle imbalance are among the most common triggers.
- Scans done lying down can miss alignment problems that only appear when you are upright and bearing weight.
- An EOS standing scan captures the full spine in one low-dose image. This lets clinicians see how the thoracic curve relates to the rest of your body.
- If you have sudden numbness, weakness or loss of bladder or bowel control, get urgent medical help from your doctor or the nearest emergency department.
Your middle back, known in medicine as the thoracic spine, runs from roughly the base of your neck down to the bottom of your rib cage. It is made up of 12 vertebrae, and each one is connected to a pair of ribs. This link to the rib cage makes the area more stable than the neck or lower back. But it also means stiffness here can spread into the chest, shoulders and abdomen.
Middle back pain is common, yet it is often overlooked, because most attention goes to the lower back or neck. Understanding what lies behind the ache is the first step towards sorting it out.
What are the most common causes of mid back pain?
The most common causes of mid back pain are muscle strain, long periods of poor posture and joint stiffness that comes with age. Beyond these everyday triggers, several structural and medical factors can also play a part.
Hours of sitting hunched over a screen shortens the front of the chest and overloads the muscles of the mid spine.
Lifting, twisting or a sudden movement can strain the muscles and soft tissues between the ribs and spine.
Spondylosis, or degenerative joint changes, slowly stiffens the thoracic vertebrae and can cause a lasting ache.
Too much forward rounding of the upper back. In younger adults this may be Scheuermann's kyphosis, where vertebrae develop a wedge shape during growth.
Osteoporosis can weaken the thoracic vertebrae enough for a wedge fracture to happen, sometimes without an obvious injury.
Pain from the rib cage, the oesophagus or even the gallbladder can sometimes be felt in the mid back, especially on the right side.
Nerve irritation in the thoracic spine is less common than in the neck or lower back, but it does happen. If a nerve root is compressed, you may feel a band of pain wrapping around the rib cage. You can read more about how nerve compression is assessed in our guide, radiculopathy explained.
What does middle back pain feel like?
Middle back pain usually shows up as a dull, lasting ache between the shoulder blades or slightly lower. It can also feel sharp with certain movements. The pattern depends on the cause.
A broad, dull ache that builds through the working day and eases when you move around.
Middle back pain when breathing often points to irritation of a rib joint or tight muscles around the thoracic cage.
Middle back pain on the right side (or left) can point to a stiff rib joint or local muscle tension on that side.
A band-like feeling around the chest wall, which may suggest a thoracic nerve is being irritated.
When to seek urgent help
If your mid back pain comes with numbness or weakness in the legs, loss of bladder or bowel control, or sudden severe symptoms, contact your doctor or go to the nearest emergency department straight away. These are rare but need immediate attention.
How is thoracic spine pain assessed when you are standing up?
Thoracic spine pain is best assessed upright, because standing loads the spine the way it is loaded in daily life. Lying down for a standard X-ray or MRI relaxes the muscles. This can hide the posture problems that actually drive your pain.
Your body works as a connected chain. If the thoracic curve increases or stiffens, the neck and lower back must make up for it. So the source of your mid back pain may actually lie above or below, and an image of a single area would miss the bigger picture.
An EOS scan at ScanAlign captures the full spine, from the base of the skull to the pelvis, in one standing image. It uses about 90% less radiation than a standard X-ray, around ten times less. Because you are upright, the image shows your natural spinal alignment in real-life conditions.
When MRI is the better choice: EOS shows bones, joints and overall alignment clearly. If your clinician suspects a disc problem, soft-tissue injury or nerve compression, MRI is usually the better tool for those details. The two scans work well together.
What helps with a sore middle back?
The right approach depends entirely on the cause. A clear diagnosis is the starting point, because treatment for tight muscles is very different from treatment for a wedge fracture or kyphosis.
General advice from physiotherapists and medical bodies often includes staying active, improving your desk setup, and strengthening the muscles that support the thoracic spine. A structured exercise programme can help address the kind of muscle imbalance that often drives mid back stiffness.
If your pain has lasted more than a few weeks, keeps coming back, or does not improve with simple measures, a clear picture of your spinal alignment can help your clinician plan the next step. That is what a standing full-spine image is designed to give.
Before you start a treatment, or change the one you are on, it is worth getting a detailed diagnosis. Knowing whether the cause sits in the pelvis, the legs or the spine changes what will actually help.
Want to understand what is behind your middle back pain? A standing EOS scan shows your full spinal alignment in one low-dose image.
Book a free video consultationFrequently asked questions about middle back pain
Sitting for long periods, especially with a rounded posture, puts extra load on the thoracic spine and the muscles between the shoulder blades. Over time this leads to stiffness, tiredness and aching. Regular breaks to move and an upright sitting position can help.
Mid back pain on one side often comes from a stiff rib joint, local muscle strain or a posture imbalance. In some cases, referred pain from organs such as the gallbladder can be felt in the right middle back. If this is new, lasting or getting worse, see your doctor.
The ribs attach to every thoracic vertebra, so inflammation or stiffness at a rib joint can cause pain with each breath. Muscle strain between the ribs is another common cause. If the pain is sudden, severe or comes with chest tightness, get medical help promptly.
Most middle back pain is caused by muscle tension or joint stiffness and settles with time, movement and changes to posture. Rarely, it can be a sign of a vertebral fracture, infection or another condition that needs medical attention. Pain that lasts or gets worse should always be checked by a healthcare professional.
Yes. Slumping for long periods increases the thoracic curve, overstretches the back muscles and compresses the front of the vertebrae. Over months or years, this load from posture can cause real structural changes and lasting pain.
Middle back pain sits in the thoracic region, roughly behind the rib cage. Lower back pain sits below the ribs, in the lumbar spine. The two regions behave differently because the rib cage keeps the thoracic area stable. However, stiffness in one region often affects the other. This is why a full-spine assessment can be valuable.
No. ScanAlign accepts self-referrals. You can book a full spine assessment directly, starting with a free video consultation to check the scan is right for you.
The EOS system uses about 90% less radiation than a standard X-ray, around ten times less. That low dose makes it particularly suitable for full-body standing images.
EOS is designed to show bones, joints and overall alignment. For soft-tissue detail such as discs, ligaments or nerves, MRI is usually the better tool. Your clinician may recommend both if a full picture is needed.
ScanAlign is a private self-pay clinic. The price for patients travelling from abroad is confirmed during the free video consultation, and you can find more on our FAQs and cost page.
Find out what is behind your middle back pain
A free video consultation, from wherever you are, lets us check whether a standing EOS scan in London is the right next step for you. No referral needed, no obligation.
Book a free video consultationWritten by Abbas Dhami (Specialist Diagnostic Radiographer)
Sources
- NHS. "Back pain." nhs.uk, 2023. Available at: nhs.uk/conditions/back-pain
- Briggs AM, Smith AJ, Straker LM, Bragge P. "Thoracic spine pain in the general population: prevalence, incidence and associated factors." BMC Musculoskeletal Disorders, 2009;10:77.
- Illés T, Somoskeöy S. "The EOS imaging system and its uses in daily orthopaedic practice." International Orthopaedics (SICOT), 2012;36(7):1405-1411.
This page is general information and not a diagnosis.
ScanAlign is the trading name of CoreMed Solutions Ltd and operates under The Harley Street Hospital's CQC licence.