Pain in the middle of your back, not the lower back

MID-BACK

The thoracic spine gets a fraction of the attention the lumbar spine does, and people with mid-back pain notice. It is less common, it is less studied, and the differential is wider.

How common it actually is

Less common than low back pain and more common than people assume. The systematic review of mid-back pain in the general population puts annual incidence somewhere in the range of three to seventeen percent depending on the population studied and how the question was asked — a wide band that tells you how thin the literature is rather than how variable the condition is.

The prognosis reported is broadly similar to low back pain: most episodes settle, a minority persist. What differs is that far fewer clinicians have a systematic approach to the thoracic spine, so persistent mid-back pain tends to bounce for longer before anyone examines it properly.

What usually generates it

• Thoracic facet and costotransverse joints. The ribs articulate with the spine at two points per level, and those joints are a genuine and under-recognized pain source. Pain is typically one-sided, worse with rotation and deep breathing, and reproduced by pressing over the joint rather than over the midline.
• Muscular and postural loading. The thoracic spine is built for stiffness rather than movement, and it protests when held in one position for hours. This is the commonest cause and the least interesting one. Sitting being worse than walking is a strong clue.
• Referred from the neck. Lower cervical facet joints refer down over the shoulder blade and into the upper thoracic region convincingly enough that people point to the wrong spine. If the pain sits between the shoulder blades, the neck is a serious candidate.
• A compression fracture. The thoracolumbar junction is where these happen, and in anyone over sixty with new mid-back pain it belongs on the list even without a fall. A vertebra that fractures lifting groceries is telling you about bone, not about lifting.

Where the differential genuinely widens

This is the honest difference between mid-back and low back pain, and it is worth stating without inflating it. The thoracic spine sits in front of the chest and abdomen, so visceral referral is a real consideration in a way it mostly is not lower down. The appropriateness criteria for imaging thoracic back pain reflect that: the threshold for investigation is lower here than for uncomplicated low back pain.

What that means practically is that we ask a wider set of questions at the first visit — about breathing, swallowing, weight, fever, and whether the pain has any relationship to eating or exertion. Most of the time every answer is no and it is a joint. Asking is what makes the reassurance worth anything. Not everything that hurts in the back is coming from the back.

The findings that need urgent assessment apply here too, with one addition: mid-back pain that is constant, unrelated to position and worse at night is the presentation that earns imaging early rather than late. Pain that wakes you is a different category.

What treatment looks like

The same sequence as anywhere else in the spine, which is the reassuring part. Establish whether it is joint, muscle or referred; treat the loading pattern; and where a specific joint is suspected, test it with a diagnostic block before treating it as the answer. Thoracic medial branch blocks and ablation exist and work on the same logic as their lumbar equivalents — a block is the only test that finds facet pain, and there is no scan that substitutes for it.

What we will not do is treat a thoracic segment because an X-ray showed degenerative change at that level. That finding is nearly universal past middle age and it identifies nothing.