Hip Pain in Pregnancy: Why Relaxin Is Only Part of the Story

Yes, relaxin can make pregnancy hip pain more likely, but it is usually only one piece of the puzzle. Weight gain, posture changes, sleep position, and pelvic strain often matter just as much.

If your hips ache when you roll over in bed, climb stairs, or stand up after a long workday, you are not imagining it. Hip and pelvic pain are common in pregnancy, with pelvic girdle pain affecting about 1 in 5 pregnant women and general hip pain becoming more noticeable in the second and third trimesters. The good news is that you can usually tell what is common, what needs a call, and which support products may actually make daily life easier. We will help define those differences here.

Why Relaxin Can Make Your Hips Hurt

Relaxin loosens ligaments and connective tissue during pregnancy, especially around the pelvis, so your body can prepare for birth. That loosening can also make the hip and pelvic joints feel less steady, which means nearby muscles have to work harder to keep you comfortable and balanced.

Simplified diagram showing pelvic joints and ligaments during pregnancy

Relaxin is not the whole reason, though. Weight gain, a shifting center of gravity, stretched abdominal muscles, and posture changes all add pressure to the lower back, pelvis, and hips. That is why pain often shows up later in pregnancy, when your belly is heavier and everyday movement takes more effort.

For many moms, this feels most obvious at bedtime. Carrying a toddler, walking through a grocery store, or standing at the kitchen counter can all turn mild looseness into real soreness by the end of the day.

What Is Common Hip Pain vs. Pelvic Girdle Pain?

Pelvic girdle pain, or PGP, is a common pregnancy pain pattern that can affect the front of the pelvis, lower back, hips, groin, thighs, or even knees. It used to be called symphysis pubis dysfunction, or SPD. In simple terms, it means the pelvic joints are moving in a way that feels uneven and painful.

PGP often gets worse with walking, stairs, standing on one leg, getting out of a car, or rolling in bed. If you feel clicking, grinding, or a sharp pulling pain when you change positions, that pattern fits PGP more than a general “my hips are tired” feeling.

Hip pain in pregnancy can also come from sciatica or round ligament pain. Sciatica tends to cause pain, tingling, or numbness that travels into the buttocks or down the leg. Round ligament pain is usually a quick, sharp pain in the lower belly, groin, or hip area when you move suddenly, cough, or stand up fast.

Artistic illustration highlighting common pregnancy pain areas in lower body

What Usually Helps Most at Night

Side sleeping with support between the knees and under the bump is one of the most practical ways to reduce nighttime hip strain. Keeping the knees together when you turn can also help, because it limits the twisting that often flares pelvic pain.

For product choices, think about what problem you are trying to solve. A full-body maternity pillow can help if your pain shows up all over your hips, belly, and lower back. A smaller wedge pillow works better if you mainly need targeted support under your bump or behind your back. A firm pillow between your knees helps keep your top leg from pulling your hips out of line.

Left-side sleeping is often preferred in pregnancy, but comfort still matters. If you wake up sore on one side, try switching sides during the night, adding a pillow behind your back for support, or placing a small folded blanket under your waist if there is a gap between your body and the mattress.

Which Support Products Can Help During the Day

Maternity support garments may improve pain, balance, and daily function for some pregnant women. These include belts, cradle supports, briefs, and torso-support styles. They do not fix the underlying cause, but they can reduce the load on the abdomen, pelvis, and low back.

A pelvic support belt usually helps most when the pain is worse with walking, standing, or sit-to-stand movement. It adds gentle compression around the hips and pelvis, which can make the joints feel steadier. A belly band or abdominal support garment may feel better if your discomfort is more about the weight of the belly pulling on your back and hips than sharp pelvic pain. For some women, a maternity belly band such as the Momcozy belly band product can be a practical option for gentle daytime support during walking or standing, since it is designed to ease pregnancy-related back pain and pelvic pressure by lifting and supporting the growing belly.

Maternity support products display with usage activity icons

Physical therapists often combine support belts with movement advice and exercises, because a belt alone is rarely the whole answer. Good daytime habits matter too: supportive shoes, shorter walking bursts, changing positions often, and sitting with your lower back supported instead of slouched or rigidly upright.

Simple Relief Steps You Can Try Today

Heat, cold, massage, and gentle exercise are common first-line relief options. A warm bath before bed, a heating pad on a sore hip, or an ice pack for 15 to 20 minutes can all be reasonable options depending on whether the area feels tight or inflamed.

If you sit for work, build in small resets. Stand up every 30 to 60 minutes, keep both feet on the floor, and avoid crossing your legs. If getting dressed hurts, sit down to put on pants or shoes instead of balancing on one leg.

Staying active within your pain limits is usually better than stopping completely. Short walks, prenatal stretching, or pregnancy-safe yoga can help keep muscles from stiffening around unstable joints. If you are thinking about pain medicine, check with your OB or midwife first, even for over-the-counter options.

Pregnant woman doing gentle yoga stretches in a comfortable home environment

When to Call Your Clinician Now

Most pregnancy hip pain is common but uncomfortable. Still, some patterns deserve a call sooner rather than later.

Severe pain, pain lasting more than 2 weeks, or pain with fever, bleeding, contractions, or burning with urination should be checked. Those symptoms can point to something more than routine joint strain.

Call promptly if you have pelvic pressure before 37 weeks, contractions every 5 to 10 minutes, clear or pink discharge, sudden weakness, numbness, major trouble walking, or pain that feels sharp and escalating instead of sore and positional. If you are unsure whether it is “normal,” that is enough reason to call.

FAQ

Q: Does relaxin directly cause hip pain in every pregnancy?

A: No. Relaxin can loosen the tissues around the pelvis and hips, which may make pain more likely, but many moms feel discomfort mostly because of weight gain, posture changes, muscle strain, and sleep position.

Q: Is hip pain worse in a certain trimester?

A: It is often more noticeable in the second and third trimesters, when the uterus is larger and the extra load on the pelvis and hips increases.

Q: Should I buy a pregnancy pillow or a support belt first?

A: If your worst pain is at night or when rolling in bed, start with sleep support like a knee pillow, wedge, or full-body pregnancy pillow. If pain is worse when walking, standing, or doing errands, a pelvic support belt may be the better first buy.

Final Takeaway

Hip pain in pregnancy is often common, and relaxin is partly to blame, but it is rarely the only reason. The best relief usually comes from combining better support with smarter movement.

Action checklist:

Sleep on your side with a firm pillow between your knees.
Add a wedge or small pillow under your bump if your hips pull forward in bed.
Use a pelvic support belt if walking or standing makes pain worse.
Wear supportive, low-heeled shoes and avoid standing on one leg when dressing.
Break up long sitting or standing stretches every 30 to 60 minutes.
Ask about pelvic floor or pregnancy-focused physical therapy if pain keeps returning.
Call your OB or midwife promptly for severe pain, contractions, bleeding, fever, numbness, or trouble walking.