Why Do My Hips Hurt When Sleeping During Pregnancy

If you’re asking why do my hips hurt when sleeping during pregnancy, you’re not alone. Hip pain during pregnancy is quite common. And for a lot of people, it starts right when they lie down—then feels worst when they wake up, especially after side-sleeping. The two biggest patterns usually come down to pressure on the hip/sit bones and pregnancy-related joint/ligament loosening tied to the hormone relaxin.

Below is a sleep-focused guide that matches your timing (during side-lying vs when you wake) to the most likely causes, plus practical things to try tonight.

Why hip pain happens when you sleep on your side during pregnancy

A common story goes like this: you get comfortable on your side, and within a short time your hip or the bony “sit” area starts to ache. That’s often because your body is resting its weight in the same spot for hours.

Two things can work together:

• Prolonged side-lying pressure on the hip and sit bones (more on this below).
• Pregnancy changes that can make the pelvis and hip area feel more “full,” heavy, or tender (again, more below).

When you’re pregnant, your body also has to handle extra weight and shift its alignment. So the exact same pillow-and-position you used before pregnancy can start to feel wrong pretty quickly.

How it typically feels

People often describe pain as:

• soreness that ramps up quickly after you settle in
• achiness where your body presses against the mattress
• pain that’s easier to notice on one side (the side you sleep on most)

Relaxin and pelvic/hip pressure: what the hormone explanation means for sleep

Relaxin is a hormone during pregnancy that loosens ligaments (ligaments are the tough bands that connect bones). When ligaments loosen, it can change how stable the pelvis and hip area feel.

That can lead to pelvic and hip pressure. In plain terms: the area may feel like it’s under more “strain” even if you didn’t do anything wrong.

How this shows up during sleep:

• Your joints and pelvis may be more sensitive.
• A side-sleep position can make pressure feel stronger because your hip is taking a lot of load.

This is also why some people feel sore even if they’re not “doing it wrong.” It’s not you—your body is changing.

Pressure points: how prolonged side-lying can trigger sore hips and sit-bone pain

This is the other big driver. When you lie on your side for a long stretch, you’re basically pinning your weight into a few spots—your hip and the sit bones.

If your mattress is firmer, or if your top leg presses down in a way that pulls on the pelvis, pressure builds in the same place all night. Many people notice pain starts quickly where the pressure is applied against the mattress.

Think of it like this: if one spot on your body keeps getting the same pressure for hours, you’ll probably feel it the next time you move—sometimes the moment you wake up.

Where the soreness usually shows up

• the bony hip area
• the sit-bone area (especially on the side you lie on)
• “deep ache” feeling in the hip/pelvis region

Why you might feel hip pain when you wake up pregnant

This is a super common question—why do my hips hurt when I wake up pregnant?

When you sleep, you’re mostly staying in one position. If that position is side-lying, your hip and pelvis may be under steady pressure for hours. Then you wake up, move, and your tissues have to adjust again. That moment can make the pain feel sharp, stiff, or extra noticeable.

It can also happen because:

• the pressure has had time to build
• your body is looser (thanks to pregnancy changes), so it may feel less “protected” from that pressure
• you change position and stretch tissues that were held in place all night

If your hips feel best after you get moving for a bit, that pattern fits with “pressure during sleep” pretty well.

Best sleeping positions for hip pain while pregnant (side-sleeping adjustments)

You usually don’t need to give up side-sleeping entirely. But you may need to tweak how your body is stacked.

Here are practical position ideas that tend to help when the main issue is side-lying pressure.

Try “neutral” side-sleep stacking

When you lie on your side, aim for your body to feel supported—not twisted.

A simple setup:

• lie on your side with your spine as straight as you can manage
• avoid letting your top leg fall straight down toward the bed
• keep the hips from being pulled forward or rolled inward

Use pillows to reduce hip and sit-bone load

Common helpers:

• A pillow between your knees (this helps stop your top leg from dragging your pelvis)
• A pillow under your belly or around your midsection (helps keep your torso from rotating)

The exact pillow placement matters. The goal is to reduce the amount of direct pressure on the hip/sit bones.

If you switch sides, do it on purpose

If you often wake up and roll without thinking, try rolling with a plan:

• move your top leg first
• then shift your body
• keep pillows in place so you’re not returning to the same pressure point

Even small changes can reduce that “same spot all night” pressure.

How to relieve hip pain from sleeping on side during pregnancy (practical steps)

If you’re trying to answer How can I stop my hips from hurting when I sleep while pregnant?, focus on two targets: pressure and support.

Try these steps in a simple order.

Step 1: Adjust your side-sleep setup before you “tough it out”

Before you fall asleep:

• put a pillow between your knees
• make sure your top leg isn’t collapsing down
• support your belly (if that helps you stay from twisting)

This targets the “pressure points” cause.

Step 2: Protect the hip/sit-bone area from taking all your weight

You can’t completely remove pressure from side-sleeping. But you can spread it out.

If one side always hurts more, aim to:

• keep your body stacked so the hip isn’t jammed into the mattress
• use pillows so you’re not tipping your pelvis into a weird angle

Step 3: Give yourself a “reset” movement when you wake up

If pain is worst right when you wake up:

• sit up slowly
• take a moment to move your hips gently
• try a slow reposition (with pillow support) before you fully stand

That’s about reducing the shock of changing positions after hours of being held still.

Step 4: Track what seems to help

For a few nights, pay attention to:

• which side triggers more pain
• whether pain starts quickly after you lie down or only later
• whether you feel better once you get moving

This helps you figure out whether your pattern is more “pressure during sleep” or more “ongoing pelvic/hip pressure.”

Hip pain by trimester: what people report in the 1st, 2nd, and 3rd trimester

Hip pain can pop up at different times for different people. Here’s what many pregnant people notice in general, especially when tracking the sleep-related pattern.

1st trimester

Some people feel early soreness, often because pregnancy changes begin and the body starts shifting. If you’re already sleeping on your side, you might notice pressure tenderness sooner rather than later.

2nd trimester

For many, discomfort becomes more clear during this stretch. It’s a time when your body is changing and side-lying pressure can become more noticeable.

3rd trimester

Hip pain during pregnancy 3rd trimester is especially common because your body is carrying more weight and your pelvis can feel more “loaded.” If your pain is strongly tied to side-sleeping, you may notice it more as the night goes on and when you wake up.

Important note about timing

Even if you feel it most in one trimester, the two common causes usually still fit the same patterns:

• pressure from side-lying
• relaxin-related ligament looseness and pelvic/hip pressure

When hip pain at night is a red flag: what to watch for

Most hip soreness in pregnancy is common, especially with side-sleeping. But there are times when you should seek medical advice if your symptoms feel unusual, worsening, or not like your normal pattern.

Consider contacting your clinician if:

• the pain is getting steadily worse night after night instead of improving with position changes
• you have severe pain that doesn’t ease after you change positions
• you’re worried something feels “off” for you (trust that instinct)
• the pain comes with other concerning symptoms (your clinician can help sort that out)

Think of this as: position and pressure changes help a lot of people, but you shouldn’t have to ignore red-flag warning signs.

When do hips start to widen during pregnancy?

Another PAA question people ask is when do hips start to widen during pregnancy?

A good way to think about this is that pregnancy changes the pelvis gradually. The pelvis is affected by pregnancy hormones like relaxin, which loosens ligaments. That looseness can start contributing to the way the pelvic/hip area feels during pregnancy—not as a single “day,” but as a steady change over time.

Why you can feel pain before you “see” widening

Even if your hips feel like they’re widening later on, pain can show up earlier because:

• ligaments loosen and pelvic/hip pressure can increase
• your sleeping position keeps putting pressure on the hip/sit-bone area
• your body may shift as pregnancy progresses, even if it doesn’t feel like a big change day-to-day

When to talk to your clinician about hip pain during pregnancy

It’s smart to reach out if you’re dealing with hip pain that’s limiting your sleep or getting worse.

Talk to your clinician if:

• your hip pain keeps waking you up or you can’t find a position that helps
• you try the side-sleep pressure changes (pillow between knees, better stacking/support) and you still don’t see improvement
• the pain feels unusual for your pregnancy
• you have any red-flag concerns, especially if symptoms are worsening

Also, if you’re not sure whether your pain is mostly from pressure or more from pelvic/hip pressure, your clinician can help you sort out what fits your situation best.

If you’re still waking up sore, try the position/pressure changes in this guide and talk with your clinician if symptoms feel unusual or worsen.