Back pain during pregnancy is extremely common. Between 50% and 70% of pregnant women experience it, making it one of the most frequent physical complaints of pregnancy. While it can range from mildly annoying to seriously disruptive, the vast majority of pregnancy-related back pain is a normal response to the rapid changes happening in your body.
Why Pregnancy Causes Back Pain
Several changes happen simultaneously during pregnancy that put new stress on your spine and pelvis. The most significant is hormonal. Your body produces a hormone called relaxin, which loosens the muscles, joints, and ligaments around your pelvis, back, and abdomen to prepare for delivery. While this loosening is necessary for labor, it can make your back and pelvis feel unstable or weak, and it often affects your posture.
At the same time, the growing weight of your baby shifts your center of gravity forward. Your body compensates by adjusting its alignment: your head tilts slightly, your upper spine extends backward, and your knees and ankles shift to keep you balanced. These postural adjustments, even when subtle, change the way forces distribute across your lower back. Add in the stretching and weakening of your abdominal muscles (which normally help support your spine), and your lower back muscles end up doing significantly more work than they’re used to.
Two Types of Pregnancy Back Pain
Not all pregnancy back pain feels the same, and where you feel it matters. The most common type is lumbopelvic pain, which shows up in the lower back and the back of the pelvis. This is the aching, stiff sensation many women describe when they’ve been standing or sitting for a while.
The second type is pelvic girdle pain, felt in the pubic bone, groin, hips, buttocks, or tailbone. Pelvic girdle pain often gets worse with activities like walking, climbing stairs, or turning over in bed. Some women experience both types at once. Knowing the difference can help you describe your symptoms clearly and get the right kind of support.
What Helps Relieve It
Gentle, targeted exercises are one of the most effective ways to manage pregnancy back pain. The goal is to maintain mobility, strengthen the muscles that support your spine, and release tension in your hips and pelvis. Aim to hold stretches for 5 to 10 seconds and repeat them 4 to 5 times. If anything causes discomfort, ease up on how far you stretch or how long you hold it.
Pelvic tilts are a good starting point. Sit on a chair or a birthing ball, sit as tall as you can to emphasize the curve in your lower back, then slouch as far as you can, rolling back onto your tailbone. This movement gently mobilizes the lower spine. Pelvic circles work similarly: sit on a birthing ball and circle the ball underneath you in one direction, then switch.
Cat-cow stretches are another reliable option. On all fours, round your shoulders and push the middle of your back up toward the ceiling, then slowly lift your head and arch in the opposite direction. This alternating movement loosens the entire spine and feels particularly good after a long day.
Child’s pose provides a deeper stretch. Kneel on the floor or your bed, sit your bottom onto your heels (a pillow behind your knees can help), widen your knees to make room for your belly, and stretch your hands forward as far as is comfortable. You can lean on pillows if reaching the floor is difficult. For a side variation, reach your right hand over your left arm to stretch one side, then switch.
A lower abdominal exercise can also help by gently re-engaging the core muscles that support your back. Place your hands on your lower belly below your navel, breathe in normally, then breathe out while gently pulling your abdominal muscles in and away from your hands. Hold for 10 seconds while continuing to breathe.
Sleeping With Less Pain
Nighttime back pain is one of the most frustrating parts, because poor sleep makes everything feel worse. Sleeping on your side with one or both knees bent in a neutral position is the most comfortable arrangement for most pregnant women. Strategic pillow placement makes a real difference: try placing a pillow between your bent knees to keep your hips aligned, another under your stomach to support its weight, and one behind your back for stability. Full-length body pillows can accomplish all of this at once and are worth considering if your pain regularly wakes you up.
When Back Pain Signals Something Else
Most pregnancy back pain is musculoskeletal and harmless, but certain patterns warrant prompt attention.
A low, dull backache below the waistline that comes and goes rhythmically can be a sign of preterm labor, particularly if it’s accompanied by pelvic pressure, cramping, or a change in vaginal discharge. This is different from the steady ache that worsens with activity and improves with rest.
Back pain combined with fever, chills, nausea, or pain in your side (flank area) may indicate a kidney infection. Urinary tract infections are more common during pregnancy, and when they spread to the kidneys, back pain is often the most noticeable symptom. Other signs of a UTI include pain when urinating, cloudy or strong-smelling urine, and an urgent or frequent need to go. If you have back pain alongside any of these symptoms, it needs evaluation quickly, because untreated kidney infections during pregnancy can become serious.
The key distinction is pattern and context. Musculoskeletal back pain is typically related to movement or position: it gets worse when you stand too long, eases when you shift, and doesn’t come with fever or urinary symptoms. Pain that is rhythmic, worsening regardless of position, or accompanied by systemic symptoms like fever or vomiting is a different situation entirely.