You pull the blankets up, settle onto your side just like your midwife suggested, and get ready for a good night's sleep. A few hours later, you wake with a deep, throbbing ache right on the side of your hip. It feels like you've been lying on a tender bruise, even though your skin looks completely normal. So you roll to the other side to escape it, only for the same bruised feeling to wake you a few hours later.
If you're playing this exhausting game of musical chairs every night, you're far from alone. This deep, tender ache is one of the most common complaints in pregnancy.
Side sleeping is the position generally recommended in the second and third trimesters, but it does ask your hips to carry the brunt of your growing weight. The good news is that once you understand why your hips are protesting, you can adjust your sleep setup, soothe the soreness, and get back to some uninterrupted rest.
Because this is really a load-and-alignment ache, a women's health physio is the ideal person to see if it's disrupting your sleep night after night. Jess at The Mama Physio (@the.mama.physio) shares gentle, pregnancy-safe strategies for hip and pelvic comfort worth a follow if sore hips are a nightly battle.
Why Does It Feel Like My Hip Is Bruised?
That deep, tender ache on the outside of your thigh usually isn't an actual bruise. It's more often your body's response to a mix of pregnancy hormones, gravity, and steady pressure. A few things tend to be going on:
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The cushioning around your hip: There's a small, fluid-filled cushion where your thigh bone meets your hip. Lying on one side for hours can press it between bone and mattress, and many women find that spot gradually gets irritated and sensitive to the touch.
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The loose-joint effect: During pregnancy your body releases a hormone called relaxin. Its job is to loosen the ligaments holding your bones together so your pelvis can stretch for birth. According to Australia's Pregnancy, Birth and Baby service, this looseness means your pelvic joints lose some of their usual stability. When you lie on your side, your top knee tends to drop forward, twisting the top hip inward and pulling on the muscles of the lower hip through the night.
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Steady pressure in one spot: Staying in one position on a firm mattress for hours can leave the area feeling stiff and tender by the middle of the night, which adds to that "bruised" sensation.
How to Protect Your Hips and Sleep Comfortably
You don't have to give up safe side sleeping to ease the ache. Keeping your body aligned and giving tired muscles a little care can take a lot of the pressure off your hips.
1. Keep Your Hips Level and in Line
The best way to stop your top leg from dropping forward and twisting your pelvis is to keep your knees and hips separated and level. A regular bedroom pillow between the knees rarely cuts it, it flattens or slides across the bed the moment you fall asleep, and your hips twist anyway.
The Sleepybelly Pregnancy Pillow is built to hold that alignment. It supports your bump at the front and your back at the same time, so your body stays gently anchored on its side instead of rolling forward or back. With your hips, knees, and lower back kept in a level, parallel line, the twisting forces that overstretch your outer hip and press on those tender spots have far less chance to build up overnight. Our guide to using a pregnancy pillow for better sleep has more on setting this up.
2. Soothe Tired Muscles With Magnesium Cream
When your hip and glute muscles work overtime to steady loose joints, they can feel tight and achy by bedtime. Massaging a little Sleepybelly Magnesium Body Cream into your outer hips, glutes, and lower back as you change into your pyjamas is a soothing pre-sleep ritual that many pregnant women swear by.
3. Soften Your Mattress
If your bed is on the firmer side, it can push back hard against your hip bones. Try layering a plush mattress topper, a thick bamboo quilt, or even a folded blanket under your hips. A softer, padded surface helps spread your weight more evenly so it isn't all landing on one spot.
When to Chat With Your Care Team
A dull, bruised ache from side sleeping is a common part of pregnancy, and many women find it eases once they're up and moving in the morning. Even so, you shouldn't have to push through severe pain.
If your hip pain is intense enough that you're limping, struggling to stand on one leg, or finding stairs difficult, it's worth mentioning to your midwife or doctor. For hands-on help, a women's health physio like Jess at The Mama Physio (@the.mama.physio) can give you gentle, personalised exercises to steady your pelvis and take the load off your hips.
The Bottom Line
That nagging, bruised hip feeling is your body reacting to gravity, loose ligaments, and steady side pressure. By using a pregnancy pillow to keep your body from twisting and massaging in a little magnesium cream to soothe tired muscles, you can protect your hips from a firm mattress and get back to a deeper, more comfortable night's sleep.
Frequently Asked Questions
Which side should I sleep on to ease my pregnancy hip pain?
Either side is fine. Sleeping on your left is often suggested because many find it supports good blood flow, but Australia's Raising Children Network notes the most important thing is simply settling on your side rather than your back. If your left hip is sore, it's completely fine to switch to your right to give it a break — what matters most is staying aligned so your hips aren't twisting.
Why does the bruised feeling fade soon after I get up?
Once you're up and moving, the pressure comes off that tender spot and gentle movement gets your circulation going again. That's why many women find the soreness lifts within a little while of getting out of bed.
Can I just use a regular pillow between my knees?
You can try, but regular pillows tend to cause two problems. They flatten under the weight of your leg, so they don't give enough height to keep your hips level, and they slide away the moment you roll or toss, leaving your pelvis to twist unguided for the rest of the night.
How does magnesium cream help if the issue is pressure from the mattress?
The mattress pressure sets off the initial tenderness, but a lot of the deep ache comes from your hip and glute muscles working hard to steady loose joints. Many women find massaging magnesium cream into the area is a soothing way to help those tight muscles relax before sleep.
Could this bruised feeling be a sign of pelvic girdle pain (PGP)?
It can be. Pelvic girdle pain (PGP), sometimes called symphysis pubis dysfunction (SPD), is closely related to hip soreness because both stem from loose pelvic ligaments. If the ache spreads to your pubic bone at the front, your lower back, or your tailbone or it hurts to part your knees it's worth keeping your legs parallel and checking in with a women's health physio.
The information in this article is general in nature and intended as comfort support only. It is not medical advice. Always consult your midwife, GP, or a qualified healthcare provider for guidance specific to your situation.
