Your back and pelvis hurt. Here is what to do about it.

Roughly two thirds of pregnancies involve back pain at some point, and ACOG describes it as one of the most common complaints of pregnancy. That is cold comfort at 4pm on a day when standing up from a chair has become an event. The useful thing to know is that “pregnancy back pain” is actually three different problems wearing the same name, and they want three different answers.

Which of the three do you have?

Lumbar pain sits in the small of your back, gets worse through the day, and is worst after standing or carrying. It is a load problem: your center of gravity has moved forward, your lumbar curve has deepened to compensate, and the muscles either side are working overtime. A belt that lifts the belly reduces the load, and it works immediately when it fits.

Pelvic girdle pain (you may see it called SPD) is lower and more specific: at the front over the pubic bone, at the back over one or both dimples above your buttocks, or both. The tell is that it hurts on single-leg movements — stairs, getting out of a car, rolling over in bed, putting on trousers standing up. A wide belly-lift belt often does nothing for this. What helps is a narrow pelvic (sacroiliac) belt sitting low across the joints, plus changing how you move: keeping your knees together when you turn over, sitting down to dress, taking stairs one at a time.

Sciatic-type pain runs from the buttock down the back of one leg and can come with numbness or pins and needles. It is a nerve-irritation problem rather than a muscle-load problem, so compression is at best indirect help. What tends to matter more is unloading the side it is on — side-lying with support, avoiding long sitting, and getting assessed if there is weakness rather than just pain.

Belt, band or neither

The category is genuinely confusing because three different products share a shelf. A belly band is a stretchy tube: it holds unbuttoned jeans up and smooths the transition between sizes. It is clothing, not support. A maternity support belt is structural: it passes under the bump and lifts, usually with a wide back panel, and it is the thing to buy for lumbar pain. A pelvic or sacroiliac belt is narrow, sits low across the joints rather than under the bump, and is the thing to buy for pelvic girdle pain. Buying the wrong one of the three is the most common reason people conclude that “belts don't work”.

What decides the price

Sizing method, adjustment range and back-panel construction. A one-size band with a single strip of hook-and-loop is cheap and works until your measurements leave its range. A belt sized M through 2XL with a shaped back panel costs more and keeps fitting. Beyond that you are paying for breathability (which matters most in summer and under work clothes) and for extras like a pocket for a hot or cold pack. Nothing in this category is expensive relative to how much a usable afternoon is worth.

The part products cannot fix

Support is a prop, not a treatment. The things that change the trajectory of pregnancy pelvic and back pain are mostly not purchases: staying active within what your provider has advised, not standing still for long stretches, sitting with your hips level, and getting a referral to a physiotherapist if the pain is limiting what you can do. Ask about that referral earlier than feels reasonable — waiting lists are long and the advice is specific to how your pelvis is actually moving.

And some pain is not musculoskeletal. Regular tightening before 37 weeks, pain with bleeding, pain with a fever, severe one-sided pain, pain with reduced movements, or a sudden headache with visual changes are all reasons to contact your provider now rather than buy anything. Every page in this hub leads with that, because the honest version of a pain-relief site has to.

Start with the support belt comparison if you already know you want a belt, or pregnancy back pain relief to work out which of the three problems you are dealing with.