Sleeping with Pelvic Girdle Pain During Pregnancy: A Practical Guide

Pelvic girdle pain affects up to one in five pregnancies in Australia. It is caused by instability and inflammation in the joints of the pelvis — the sacroiliac joints at the back and, in some cases, the symphysis pubis at the front and it ranges from a dull, persistent ache to sharp, debilitating pain that affects walking, climbing stairs, turning over in bed, and getting in and out of a car.

Despite how common it is, PGP is frequently dismissed as normal pregnancy discomfort to push through. It is not. It is a diagnosable musculoskeletal condition with specific management strategies, and the earlier it is identified and addressed, the better the outcomes.

Sleep is one of the most consistently affected areas. The horizontal position required for sleep, combined with the need to move and roll during the night, creates exactly the conditions that aggravate PGP most. This post covers what physiotherapy-aligned guidance actually recommends for managing PGP at night — practically and specifically.

This post does not replace assessment and treatment by a women's health physiotherapist. If you suspect PGP, a referral from your GP or midwife is the most important first step you can take.

What pelvic girdle pain actually is

The pelvis is made up of three bones — the two ilium bones at the sides and the sacrum at the back — joined by three joints. During pregnancy, the hormone relaxin loosens the ligaments holding these joints together in preparation for birth. In some women, this loosening creates instability that the surrounding muscles cannot fully compensate for, resulting in inflammation, pain, and significantly reduced load tolerance.

PGP is an umbrella term that covers pain in the sacroiliac joints, the symphysis pubis, or both. Symphysis pubis dysfunction, or SPD, refers specifically to pain at the front of the pelvis at the joint where the two pubic bones meet. The distinction matters because some management strategies differ slightly depending on where the pain originates.

The defining characteristic of PGP is that it is provoked by activities that involve asymmetric loading of the pelvis — putting more weight through one leg than the other, or rotating the pelvis unevenly. Walking, climbing stairs, getting in and out of a car, turning over in bed, and separating the knees all involve this kind of asymmetric loading, which is why these activities are consistently the ones that hurt most.

Why sleep is particularly hard with PGP

Rolling over in bed is one of the most provocative movements for PGP. Every time you change position during the night, your pelvis rotates and your legs separate momentarily — both of which load the pelvic joints asymmetrically. For women with moderate to severe PGP, this can cause a sharp pain spike that wakes them fully and requires several minutes to settle.

Getting in and out of bed at the start and end of the night, and during nocturnal bathroom trips, involves the same mechanism. The leg that leads the movement creates asymmetric loading as you swing it off the bed or step down to the floor.

The position you lie in also matters. Lying with your hips twisted — top knee dropping forward of your body rather than stacked over the bottom knee — creates a rotational force through the sacroiliac joints that builds into pain over the course of an hour. Many women with PGP find they wake in the early hours rather than immediately after lying down, because this rotational force takes time to accumulate into pain.

What physiotherapy guidance recommends for sleep positioning

Women's health physiotherapists consistently recommend the following sleep positioning principles for PGP. These are not cures — they are strategies that reduce the mechanical provocation of the joints overnight, which means less pain disrupting sleep.

Keep your hips stacked. The most important principle for PGP sleep positioning is keeping your knees and hips stacked directly on top of each other rather than allowing your top knee to drop forward. A dropped top knee rotates your pelvis and loads the sacroiliac joints on the side you're lying on. A pillow between your knees that is thick enough to keep your hips genuinely stacked — not just slightly supported — is essential rather than optional for PGP.

Support under your bump. Without support under your bump, the weight of your pregnancy pulls your lower spine into rotation as you lie on your side, which affects pelvic alignment. A wedge or support underneath the bump from below keeps your spine more neutral and reduces the secondary load on the sacroiliac joints.

Something behind your lower back. Support behind your lower back reduces the tendency of your pelvis to rotate backwards during sleep and gives the muscles around your sacroiliac joints something to work against, reducing the demand on the joints themselves.

Keep your knees together when rolling. The log-roll technique is the single most important movement modification for PGP overnight. When you need to change sides — which you will — roll your shoulders, hips, and knees as one unit rather than letting your legs lead. Letting your legs swing across independently creates exactly the asymmetric pelvic loading that causes pain spikes.

To log-roll: tighten your pelvic floor gently before you move, bring your knees together if they're not already, and roll your whole body as one unit. It feels deliberate and slightly slow at first. After a few nights it becomes habitual.

If you are finding that good positioning is making a difference but the support setup keeps shifting during the night, a modular system that holds each piece independently in place addresses this directly. The Bumpnest Maternity Pillow provides the three components that PGP positioning requires — front bump support, knee support, and back support — as separate pieces that stay where they're placed when you roll, rather than a single pillow that drags across with you.

Getting in and out of bed

Getting in and out of bed is often the most painful moment of the day for women with PGP, and it happens multiple times overnight for bathroom trips. The principle is the same as log-rolling — keep the pelvis symmetrical and avoid letting one leg lead.

To get out of bed: Roll onto your side using the log-roll technique. Bring your knees together and keep them together. Lower your feet off the edge of the bed simultaneously rather than one at a time. Use your arms to push yourself up to sitting and stand slowly, keeping your feet hip-width apart as you rise.

To get into bed: Sit on the edge of the bed with your feet together. Lower yourself to one side using your arms while swinging both legs onto the bed simultaneously. Roll onto your back or side using the log-roll technique.

This takes practice and feels slower than how you naturally move. The reduction in pain makes it worth the adjustment.

Positions that make PGP worse

Understanding what to avoid is as useful as knowing what helps. The following positions and movements consistently aggravate PGP and are worth eliminating from your sleep routine.

Lying with your hips twisted — top knee dropped forward — is the main overnight aggravator. Even a small amount of forward rotation of the top hip creates sustained rotational load through the sacroiliac joints.

Heavy-sided support on one hip only — a single pillow between the knees that's too thin, or only a wedge behind the back without knee support — addresses one part of the problem without the other. PGP positioning needs to address the hips, the bump, and the back simultaneously.

Sleeping on a very soft mattress that allows the hip to sink significantly creates pelvic misalignment similar to an unsupported position. A mattress topper that's too soft can make PGP symptoms worse even with good pillow positioning.

During the day: habits that affect how well you sleep at night

PGP is cumulative — how much you provoke your pelvis during the day affects how much pain you experience at night. Reducing asymmetric loading during the day reduces the overall inflammation and sensitivity that makes night pain worse.

Practical daytime habits that reduce PGP provocation include sitting down to put on shoes and trousers rather than balancing on one leg, keeping your stride length shorter when walking rather than taking large steps, sitting with your knees together or hip-width apart rather than crossed, using a step stool to get into vehicles rather than swinging one leg in, and carrying loads close to your body and symmetrically rather than on one side.

A pelvic support belt worn during the day can help some women with PGP by providing external compression to the sacroiliac joints when the surrounding muscles are fatiguing. Whether this is appropriate for your specific presentation is worth discussing with your physiotherapist — it is not suitable for all types of PGP.

When to see a women's health physiotherapist

If you haven't already been assessed, this is the most important action you can take. A women's health physiotherapist can confirm whether what you're experiencing is PGP, identify which joints are affected, assess your pelvic floor and surrounding muscle function, and provide a specific management plan for your presentation.

PGP is not a condition you should manage alone based on general advice, including this post. The strategies here are grounded in physiotherapy guidance and are safe for most women with PGP, but individual presentations vary and some strategies need modification depending on your specific joints and severity.

Your GP or midwife can provide a referral. In Australia, physiotherapy for PGP during pregnancy may be partially covered by Medicare under a chronic disease management plan, or covered by private health insurance if you have extras cover. Ask your GP.

After birth: when does PGP resolve?

For most women, PGP improves significantly within a few weeks of birth as relaxin levels drop and pelvic joint stability returns. Complete resolution can take several months, and some women experience persistent symptoms particularly if PGP was severe during pregnancy or if postnatal rehabilitation is delayed.

Continuing to use the log-roll technique and symmetrical movement habits in the early postpartum period reduces provocation while your joints restabilise. A postnatal physiotherapy assessment at around six weeks after birth is particularly valuable if you had significant PGP during pregnancy.

A maternity pillow continues to be useful in the early postpartum weeks for the same positional reasons it helps during pregnancy — keeping your hips stacked and your lower back supported during the long periods of rest that postpartum recovery requires.

[See the Bumpnest Maternity Pillow →]