Why Does My Pelvis Still Hurt Months After Having a Baby?

Pelvic, SI joint, or pubic bone pain that never quite went away after birth is common — and it usually isn't your pelvis being "out." A physiotherapist explains what's actually going on.

It shows up rolling over in bed. Getting out of the car. Standing on one leg to put trousers on. Carrying the baby on one hip for the fifteenth time that day. A deep ache at the back of the pelvis, or a sharp pinch right at the front, and the quiet, creeping thought that this was supposed to be gone by now.

If your pelvis still hurts six months, a year, or three years after birth, you are not an outlier and you are not broken. Persistent pelvic girdle pain after pregnancy is common, well described in the research, and — this is the part nobody tells you — largely a load problem rather than a damage problem. That distinction changes what you do about it.

What is postpartum pelvic girdle pain?

"Pelvic girdle pain" is the umbrella term for pain in the ring of joints that connects your spine to your legs. There are three joints in that ring: the two sacroiliac (SI) joints at the back, where the base of your spine meets your pelvis, and the pubic symphysis at the front, where the two halves of the pelvis meet.

Pain can sit at one of them, or move between them. Typical descriptions from a physiotherapy perspective:

• A deep, dull ache in one buttock or low on one side of the back
• A sharp catch at the front, low and central, especially on single-leg tasks
• Pain that is worse rolling in bed, climbing stairs, standing on one leg, or standing still for a long time
• Pain that is often better walking than standing, and often worse at the end of the day

It is usually one-sided, or clearly worse on one side. That asymmetry is a clue about how you are loading yourself — it is not evidence that something has slipped.

Why does pelvic pain persist months after birth?

Three things stack up, and they interact.

1. The tissue timeline is longer than the appointment timeline. The muscles of the pelvic girdle and abdominal wall spent months being stretched and loaded in an unfamiliar way. Research on postpartum recovery suggests it can take on the order of nine months for that muscular support system to return toward its pre-pregnancy capacity — well past the six-week check that most people treat as the finish line.

2. Hormonal laxity fades, but the habits formed around it don't. Pregnancy hormones increase joint laxity. After birth that ligament laxity gradually settles, but the compensations you built while it was there — standing hitched onto one hip, hinging from the back rather than the hips, gripping through one side — often stay. Those are learned patterns, and learned patterns persist until something teaches the body a different one.

3. Demand goes up exactly when capacity is lowest. This is the mismatch that explains most persistent cases. Around three to eight months, the baby doubles in weight, the carrying is constant, the floor-to-standing transitions are endless, and sleep is fragmented. Capacity is still rebuilding while load climbs steeply. Pain is very often the gap between those two lines, not evidence of injury.

The persistence is real and documented: roughly one in five women who have pelvic girdle pain during and immediately after pregnancy still report pain two to three years later, and around one in ten have symptoms lasting beyond three months without targeted rehabilitation. Those numbers are worth knowing for two reasons. First, so you stop assuming you're the only one. Second, because "wait and see" is a strategy with a known, modest success rate — and there are better options.

Is my pelvis "out of alignment"?

Almost certainly not in the way the phrase suggests.

The image most people are handed — a pelvis that has slipped out of place and needs putting back — does not hold up well. The SI joints are among the most heavily reinforced joints in the body, wrapped in some of the thickest ligaments you own. They move a few millimetres. They do not casually dislocate and then sit "out" for eighteen months while you carry a toddler around on them.

What is usually happening is that one side of the pelvic ring is being asked to tolerate more load than it currently has the muscular support to handle comfortably. The joint is not out. It is load-intolerant — sensitive to demand it can't yet meet.

That reframe matters because the two stories lead to completely opposite behaviour. "My pelvis is out" leads to seeking repeated passive correction and to moving carefully, because you might knock it out again. "My pelvis is under-supported" leads to building support and graded exposure to load — which is the approach with far better evidence behind it. Being handed the fragility story is one of the most common reasons people stay stuck for years.

How do I know if it's my SI joint, my pubic bone, or my hip?

Honestly, precise self-diagnosis is not the useful step here, and it's not something an article can do for you — the presentations overlap heavily and a proper differentiation needs hands-on assessment. But a rough orientation, as general education:

• Back of the pelvis, in the dimple area, one side: most consistent with SI joint-related pain.
• Front and low, central, worse on single-leg tasks and separating your legs: most consistent with pubic symphysis-related pain.
• Deep in the groin or the side of the hip, with pinching at end range: more likely hip-related.
• Buttock pain with pins and needles or numbness running down the leg: this one is different in kind — it points toward nerve involvement and warrants assessment rather than self-management.

A useful general observation rather than a test: notice whether your pain is provoked by single-sided load (one leg, one hip, one side) more than by two-sided load (both feet down, both arms). Pelvic girdle pain is characteristically a single-sided-load problem, and that observation tends to be more informative for planning than naming a structure.

What actually helps postpartum pelvic girdle pain?

The approach that tends to work is unglamorous and sequential. Five changes, roughly in order:

1. Stop the asymmetric habits you can actually control. Baby on one hip, bag on one shoulder, standing hip-hitched while you make dinner, nursing twisted the same direction every time. None of these caused the problem on their own. All of them keep feeding it. Alternating sides is free and it is usually the fastest-acting change available.
2. Rebuild the pressure system underneath the pelvis. The pelvic floor, deep abdominals, and diaphragm work as one unit, and the pelvic ring sits inside it. Restoring that system — starting with breathing, then deep-core connection — gives the pelvis something to be supported by. This is the step people skip, and it is the one that tends to change things most durably.
3. Train the hip and glute muscles that actually stabilise the ring. The glutes on the side of the hip and the deep hip rotators are what control the pelvis when you stand on one leg. If single-leg tasks are your worst provoker, they're also your clearest training target.
4. Modify, don't avoid. Reducing a provoking task to a version you tolerate — a shorter walk, a shallower step, a supported single-leg position — keeps the tissue loaded and adapting. Complete avoidance shrinks capacity, which is the opposite of what you want, and tends to make the eventual return harder.
5. Build back up on purpose, not by accident. Once tolerance improves, add load deliberately and gradually rather than waiting to feel "ready" and then doing a full day of carrying. Predictable, progressive load is what builds tolerance; unpredictable spikes are what provoke flares.

Does a support belt help?

Sometimes, as a short-term tool, and it's worth being clear about what it does. A pelvic support belt can reduce pain for some people during specific tasks by adding external compression to the ring. That is genuinely useful when you have a day of walking ahead of you and you'd otherwise flare.

What it doesn't do is build capacity. Worn all day, every day, indefinitely, it becomes a substitute for the support you're trying to develop rather than a bridge to it. The general principle most physiotherapists work with: use it for the hard task, take it off afterwards, and keep building the thing that will eventually make it unnecessary.

When should I see someone about it?

See a licensed pelvic-health provider in your area if the pain has persisted past three months, if it's limiting things you want to be doing, if it's worsening rather than settling, or if you've been working at it consistently and plateaued. The research is reasonably clear that persistent pelvic girdle pain becomes harder to resolve the longer it goes unaddressed, so "give it another six months" is not a neutral choice.

Where to start

If the picture above is familiar — pain that never quite resolved, worse on one side, worse on single-leg tasks, and not improving on its own — the useful first move is usually not a new exercise. It's getting the order of operations right, so that the support system underneath the pelvis is rebuilt before load goes back up.

That sequence is exactly what the free 6-Week Postpartum Movement Roadmap lays out: what "cleared" actually means, where to start, and what order to build in.

Frequently asked questions

This article is general education from a physiotherapist's perspective. It is not individualized physiotherapy advice, does not create a therapist-patient relationship, and is not a substitute for care from a licensed healthcare provider in your area. Harleen Kalra is a physiotherapist registered in British Columbia, Canada. For personalized assessment and treatment, please see a licensed pelvic-health provider where you live.