When it first shows up
It's often a small moment. Turning over in bed at three in the morning and feeling something catch low down. Standing up from the sofa and needing a second before you can straighten. Bending to pick up a shoe and thinking, that shouldn't have been that hard.
Many women assume this sort of pain belongs to the final weeks, when the bump is at its biggest. In practice it frequently begins much sooner, sometimes as early as the second trimester, well before the extra weight seems like enough to explain it.
What's changing underneath
Your body starts producing a hormone called relaxin early in pregnancy. Its job is to loosen the ligaments around the pelvis in preparation for birth. It doesn't confine itself neatly to that area, and the ligaments supporting your spine soften too, which means the usual stability lower down your back is reduced.
At the same time, the weight at the front of your body is increasing, and your centre of gravity moves forward with it. Most women lean back slightly to compensate, which increases the curve in the lower spine and asks more of the muscles that hold that curve steady. Two changes arriving together, loosening and loading, is a large ask for one part of the body.
It doesn't look the same for everyone
Some women feel it as a dull ache around the pelvis, worse after standing for a while. Others feel it higher, closer to the bottom of the ribs, especially if they carry the bump higher. A number describe a sharper pain running into a buttock or down the back of a leg, which tends to come from a nerve being irritated rather than the joints themselves.
The pattern can also differ between pregnancies in the same woman, so what helped last time isn't a reliable guide to what will help this time.
What tends to make it easier to manage
Changing position regularly matters more than finding one perfect posture, because staying in any single position for too long tends to be where the ache builds. Sleeping on your side with a pillow between the knees takes some of the twist out of the pelvis overnight.
When lifting anything, even something light like a toddler or a laundry basket, try to keep it close to your body and turn your feet rather than twisting through your spine. Supportive, low-heeled shoes help more than people expect, particularly as the pregnancy progresses and balance shifts.
When it needs a doctor rather than an osteopath
Most pregnancy-related back pain, while uncomfortable, isn't a sign of anything dangerous. But some symptoms need medical attention rather than manual treatment: sudden severe pain, pain accompanied by fever or bleeding, regular tightening that feels like contractions before term, numbness around the saddle area, or any reduction in your baby's usual movements.
If any of these apply, contact your midwife or GP promptly rather than waiting for an appointment elsewhere.
How osteopathy fits alongside pregnancy care
Osteopaths who treat pregnant women adapt their approach considerably, using gentle techniques and adjusting positioning on the treatment table as the pregnancy progresses. It isn't about correcting something that's gone wrong so much as helping your back cope better with the changes it's already going through.
At Notts Osteopathy, all our osteopaths are registered with the General Osteopathic Council. We're at 437 Westdale Lane, Mapperley, Nottingham, NG3 6DH, open Monday to Thursday 7am to 7pm and Friday 7am to 6pm, and you're welcome to call us on 0747 124 8330 to talk through whether an appointment would be useful for you.
What to do next
If your lower back pain is ordinary and building rather than sudden or severe, it's worth mentioning to your midwife and worth discussing with an osteopath. If you notice any of the warning signs listed above, contact your midwife or GP straightaway.
