Written by Michael Rizk, Co-Founder & Senior Physiotherapist, iMove Physiotherapy
TL;DR: Mid back pain (also known as thoracic pain) that flares up suddenly is rarely serious and usually settles within a few weeks. Breathing plays a bigger role than most people realise, since close to 20 of the muscles involved in breathing attach to the thoracic spine. Slow, controlled breathing calms the muscles and the nervous system down, while gentle movement and correctly timed breathing during exercise are what get you back to normal.
If you’ve woken up or moved awkwardly and felt a sudden, sharp pain lock up your mid back, breathing is very likely part of both the problem and the fix. The thoracic spine, the section of your back between your shoulder blades, shares close to 20 muscles with the mechanics of breathing. When those muscles tighten up in response to pain, your breathing gets shallower, which in turn keeps the muscles tight. Slowing your breath down is one of the fastest ways to interrupt that cycle and start feeling normal again.
Why mid back pain happens
Mid back pain tends to show up in a handful of familiar situations. A quick rotational movement, like reaching into the back seat of the car or twisting to lift a child, is one of the most common triggers we see at our Sydney clinics. Sitting or staying in one position for long stretches, whether at a desk or on a long drive, is another. Stress and poor sleep also play a role, since both keep the muscles around the ribs and shoulder blades held tighter than usual.
None of these are dramatic causes, which is part of why the pain itself can feel so alarming. A sharp, breath-stealing pain that appears out of nowhere understandably makes people worry something is seriously wrong. In our experience treating patients across Rozelle, Panania, Clovelly and Waverley, the vast majority of these episodes are musculoskeletal, not a sign of anything sinister, and they respond well to the right early management.
The first thing to do when it happens
Breathe, deliberately and slowly. Take a breath in through your nose and out through your mouth, at a pace slower than feels natural. The first few breaths might catch a little given how tender the area is, but it gets easier within a handful of breaths as the surrounding muscles start to settle.
It can feel counterintuitive to focus on something as automatic as breathing when what hurts is your back, not your chest. The connection is anatomical rather than incidental. The diaphragm gets most of the credit for breathing, but a large supporting cast of muscles around the ribcage and spine does a lot of the work too, and many of them attach directly to the thoracic vertebrae. When breathing is restricted, whether from pain, poor posture, or simply not paying attention to it, those muscles stay tighter than they need to. A slow, controlled breath does double duty: it calms the muscles supporting the spine, and it settles the nervous system’s response to the pain itself.
Getting moving again
Once the initial sharpness has settled, mid back pain behaves a lot like any other soft tissue strain, a pulled hamstring being the easiest comparison. Rest beyond the first day or two tends to make things stiffer rather than better. The goal from here is to gradually reintroduce movement and rebuild strength, since that’s what actually reduces the chance of the same pain flaring up again in a few months.
Breathing still matters once you’re back to exercising. We generally coach patients to breathe out as they move into a stretch or as they contract a muscle during strengthening work, rather than holding their breath through the harder part of a movement. Holding your breath under load increases pressure through the trunk and tends to make the surrounding muscles brace unnecessarily, which works against what you’re trying to achieve.
When it’s more than a strain
Most mid back pain of this kind clears up within a few weeks with sensible movement and no major intervention. That said, thoracic pain is one of the areas where it’s worth being a little more cautious than you might be with, say, a stiff neck. If the pain came on without any clear trigger, if it’s associated with fevers, unexplained weight loss, or pain that wakes you at night, or if it doesn’t start easing within a couple of weeks, it’s worth getting it properly assessed rather than assuming it will resolve on its own.
According to healthdirect Australia, most upper back pain has no specific structural cause and isn’t linked to a serious underlying problem, which lines up with what we see day to day in clinic. Still, a physio assessment is the fastest way to confirm that’s the case for you specifically, and to build a plan that gets you moving properly again rather than just waiting it out.
Key Takeaways
- Sudden, sharp mid back pain is rarely a serious condition and usually improves within a few weeks.
- Close to 20 of the muscles involved in breathing attach to the thoracic spine, so restricted breathing and back pain feed into each other.
- Slow, deliberate breathing in through the nose and out through the mouth is the fastest way to settle the initial pain.
- Treat it like a muscle strain: avoid extended rest, and reintroduce movement and strength work as the sharp pain settles.
- Breathe out as you move into a stretch or contraction during exercise rather than holding your breath.
- See a physio if the pain came on without a clear cause, hasn’t started easing within two weeks, or comes with fevers, weight loss, or night pain.
If your mid back pain isn’t settling, or you’d rather have it properly assessed from the start, our physios at Rozelle, Panania, Clovelly and Waverley can help you get back to normal movement quickly. Book an appointment online to get started.
Frequently Asked Questions
Is mid back pain when breathing deeply serious?
In the vast majority of cases, no. Sharp pain with deep breaths is usually related to the muscles and joints around the ribcage and thoracic spine tightening up, not a problem with your lungs or heart. It’s still worth a physio assessment if the pain is severe, doesn’t improve within a couple of weeks, or comes with other symptoms like fever or unexplained weight loss.
Why does my mid back hurt more when I take a deep breath?
Because so many of the muscles involved in breathing attach to the thoracic spine and rib joints, a deep breath stretches and loads those same structures. If they’re already irritated, a deep breath will naturally aggravate them more than shallow breathing does.
Should I rest completely if my mid back is sore?
Complete rest beyond the first day or so tends to make thoracic pain stiffer and slower to resolve. Gentle movement, paced to what feels manageable, is generally more effective at getting you back to normal.
How long does mid back pain from breathing restriction usually take to settle?
Most cases improve meaningfully within one to two weeks with sensible movement and breathing technique, and continue to resolve over the following few weeks as strength returns.
Can stress actually cause mid back pain?
Yes. Stress and poor sleep both tend to increase tension in the muscles around the shoulder blades and ribcage, which can bring on or worsen thoracic pain even without a specific injury.
Do I need imaging like an X-ray or MRI for mid back pain?
Not routinely. Most thoracic pain is musculoskeletal and improves with movement-based treatment, so imaging is usually only recommended if there are specific red flags a physio or GP identifies during assessment.
