Pregnancy-related pelvic pain typically shows up in one or more of three areas: the front of your pelvis at the pubic bone, the back of your pelvis near the sacroiliac joints (where your spine meets your hip bones), or both. It can also radiate into your groin, inner thighs, and lower back. Roughly one in four pregnant women experiences pelvic girdle pain, and it becomes far more common as pregnancy progresses, affecting up to 60 to 70 percent of women in late pregnancy.
The Three Main Pain Zones
Your pelvis is a ring of bone held together by ligaments at three joints: two sacroiliac joints in the back and the pubic symphysis in the front. Pregnancy-related pelvic pain centers on these joints, but the exact location varies from person to person.
Front of the pelvis (pubic symphysis): Pain at the pubic bone, right at the center of your lower pelvis. This is the hallmark of symphysis pubis dysfunction, or SPD. It often feels like a sharp, stabbing sensation directly over the bone, and it can radiate downward into your perineum or outward into your groin and hip joints.
Back of the pelvis (sacroiliac joints): Pain between the posterior iliac crest and the gluteal fold, which in practical terms means deep in your buttocks, just to one or both sides of the base of your spine. This pain can travel down the back of your thigh, sometimes mimicking sciatica.
Both locations at once: Many women experience pain at the front and back of the pelvis simultaneously. When the entire pelvic ring becomes unstable, steady pain can radiate through the lower abdomen, back, groin, perineum, and thighs all at the same time.
What the Pain Feels Like
The sensation varies widely. Some women describe mild discomfort that stays localized to the front of the pelvis. Others report sudden shooting pain from the front or back, or a constant tingling, burning, or throbbing quality. A common early sign is a feeling that the pelvis is loose or wobbly, as if the bones are shifting when you move. In more severe cases, the pain is unrelenting in the pubic region and makes walking difficult because it radiates into the hip joints and down the legs.
Why Pregnancy Causes Pain in These Spots
Starting around weeks 10 to 12, hormonal shifts trigger your pelvic ligaments to soften and stretch. A hormone called relaxin remodels the collagen in these ligaments, making the pelvic joints more mobile. This is a necessary adaptation: your pelvis needs to widen for delivery. But the increased laxity can make the joints unstable, and that instability is what produces pain. One study found that women with pain at the pubic symphysis and the outer hip had significantly higher relaxin levels than those without symptoms.
The growing weight of the baby also plays a role. As the uterus expands, it places more mechanical load on already-loosened joints, which is why pain tends to intensify in the third trimester. About two-thirds of women who develop pelvic girdle pain report it during the final trimester.
Movements That Trigger Pelvic Pain
Pelvic pain during pregnancy is almost always worse with specific movements rather than constant at rest. The activities that most commonly provoke it share one thing in common: they load the pelvis asymmetrically or force the joints to shift.
- Walking: Each step transfers weight from one side of the pelvis to the other, stressing the sacroiliac joints and symphysis.
- Climbing stairs: The single-leg stance required for each step increases the shearing force across the pubic bone.
- Rolling over in bed: Twisting the pelvis while lying down can cause a sudden, sharp jolt of pain at the front or back.
- Standing on one leg: Getting dressed, stepping in and out of a car, or standing up from a seated position can all trigger pain because the pelvis is briefly unsupported on one side.
If you notice that your pain is predictable and tied to movement, that’s a strong indicator it’s musculoskeletal in origin rather than something more urgent.
When Pelvic Pain Signals Something Else
Most pelvic pain during pregnancy is musculoskeletal and, while uncomfortable, not dangerous. But some symptoms in the pelvic region point to preterm labor or other complications, and they feel distinctly different.
Preterm labor pain tends to involve regular or frequent tightening of the belly (contractions), a dull low backache that comes and goes rhythmically, and a feeling of pressure low in the pelvis. It may be accompanied by vaginal spotting, a gush or steady trickle of fluid, or discharge that is watery, bloody, or mucus-filled. The key difference: musculoskeletal pelvic pain is triggered by movement and eases with rest, while preterm labor symptoms follow a rhythmic pattern and don’t resolve when you change position. Any combination of tightening, fluid leakage, or bleeding alongside pelvic pressure warrants immediate medical attention.
How Pelvic Pain Is Managed
Treatment focuses on stabilizing the pelvic joints and reducing the load on them. A pelvic support belt worn low across the hips can compress the ring of bone and limit the movement that causes pain. Many women find significant relief from this alone.
Physical therapy is one of the most effective approaches. A therapist can teach you how to move in ways that keep your pelvis symmetrical: keeping your knees together when rolling in bed, sitting down to get dressed, and taking smaller steps. Strengthening the muscles around the pelvis, particularly the deep core and gluteal muscles, helps compensate for the ligament laxity.
Sleep positioning matters too. Lying on your side with a pillow between your knees keeps the pelvis aligned and reduces overnight pain. Ice applied to the pubic bone or sacroiliac area can help after a particularly painful day. Most women see gradual improvement in the weeks after delivery as relaxin levels drop and the ligaments tighten back up, though recovery can take several months in more severe cases.