Category: Working out what it is

WOMEN

Most back pain in women is ordinary mechanical back pain and is treated the same way. The reason this page exists is the minority where it is not, and where the delay to diagnosis is measured in years.

Start with what is the same

Facet joints, discs, sacroiliac joints and muscles behave the same way regardless of sex, and the same diagnostic sequence applies. Nothing below is an argument that women’s back pain is a different condition. It is an argument that two or three extra questions belong in the history, and that they are routinely not asked.

The pelvic differential

Endometriosis is the clearest example. It affects roughly one in ten women of reproductive age, the average delay to diagnosis is measured in years rather than months, and low back and pelvic pain are common presenting features. Deep infiltrating disease can produce pain that is genuinely musculoskeletal in character — positional, activity-related, responsive to movement — which is exactly why it lands in spine clinics and stays there.

The distinguishing feature is not the quality of the pain, it is the pattern over a month. Pain that reliably worsens in a particular phase of the cycle, or that arrived alongside a change in periods, is a different question from pain that tracks with what you lifted. We ask about it. That is the entire intervention, and it is not routinely done.

The same logic applies to a handful of other pelvic sources. None of them are common. All of them are missed by a workup that never leaves the spine.

Pregnancy, and afterward

Low back and pelvic girdle pain in pregnancy is extremely common and mostly self-limiting, and it is under-treated because both patients and clinicians treat it as something to be endured. It is not. Active management during pregnancy has reasonable support, and the group worth watching is the one whose pain does not resolve postpartum — that population is at meaningfully higher risk of persistent low back pain later, and it is the point at which intervening is easiest.

If your back has hurt since a pregnancy several years ago, that is not something you missed the window on. It is a sacroiliac and load-tolerance question and it is still answerable. The worst moment of the day being rolling over in bed is the classic sacroiliac description.

Menopause and bone

Two things change and they pull in the same direction. Bone density falls, which moves vertebral compression fracture from a rare consideration to a real one — and those fractures happen without a fall, lifting something unremarkable. A vertebra that fractures lifting groceries is telling you about bone, and the fracture is the presenting symptom of the bone problem rather than the other way round.

The second is metabolic. Body composition and insulin sensitivity both shift, and the disc is fed by diffusion through an avascular structure that is sensitive to exactly that. This is why we draw blood at a back appointment, and it is not a lifestyle lecture — it is one of the few upstream variables anyone can actually move.

The part that is not physiology

Women’s pain is under-treated and under-investigated relative to men’s across multiple settings, and being told for years that something is stress, or hormonal, or that you are managing well, is its own clinical problem. It changes what people report at the next appointment, which changes what gets found.

So the practical advice is unglamorous: bring the pattern, not the impression. When it is worse across a month, what position provokes it, what you have stopped doing. You will be asked things nobody has asked you before — that is the point of the first visit, and several of them are the questions on this page.

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.

NO INJURY

You bent to pick up a sock. That is the story most people are embarrassed to tell, and it is the most common one there is — the absence of a mechanism is itself informative.

Why nothing has to happen

People expect back pain to be proportionate to its cause, because that is how the rest of the body behaves. Spines do not work that way. A lumbar segment loaded thousands of times a day sits somewhere on a curve of accumulated tolerance, and the sock is not the load — it is the moment the curve was crossed. The event you remember is a timestamp, not a cause.

Three things set where that threshold sits, and none of them happened on the day. The first is mechanical: how much sustained flexion the segment has absorbed and whether the deep stabilizers have any endurance left. The second is metabolic — the disc is the largest avascular structure in the body, fed by diffusion, and insulin resistance and poor glycemic control measurably degrade that supply. Nobody expects a blood draw at a back appointment, and it is one of the more useful things we do.

The third is neither: it is sleep, load at work, and how much of your week is spent in one position you did not choose. A threshold is crossed by everything sitting under it, and a fair amount of what sits under it is not biological at all.

So what actually tore?

Usually nothing. The commonest presentations after a trivial mechanism are a facet joint that has been provoked, a segment guarding hard enough to feel like structural damage, or an annular irritation that produces genuine pain with no neurological deficit at all. A spasm is your back guarding something — the useful question is what.

This is what the literature calls non-specific low back pain, and the label is honest rather than dismissive: in the acute phase a specific structure genuinely cannot be identified in most people, and trying to name one early is how you end up treating a scan.

Why the story matters anyway

Not because it explains the pain, but because of what it does to you. People who cannot name a cause tend to assume the cause is worse, and that assumption is one of the better predictors of how the episode goes. A back that hurt for no reason feels less trustworthy than one that hurt because you lifted a piano, and the fear changes how you move, which changes how it recovers.

It is worth saying clearly: pain arriving without an injury is not evidence of something sinister. It is the ordinary presentation. The short list that does need attention is defined by what comes with the pain — fever, weight loss, bladder or bowel change, progressive leg weakness — not by whether you can explain the onset.

What to do with the first week

• Keep moving. Not through the sharp end of the range, but do not stop.
• Do not go looking for the moment. Reconstructing which lift did it is satisfying and changes nothing.
• Notice what the pain does, not just how bad it is. Worse sitting, worse standing, worse rolling over — each of those points somewhere different, and it is the most useful thing you can bring us. The drive being worse than the walk is a finding, not a detail.
• Give it six weeks before drawing conclusions, and less than that if anything is becoming weaker.

If it has not settled by then, the question stops being what caused it and becomes which structure is sustaining it — and that one has a testable answer.