Hips Hurt During Pregnancy? Find Side Sleeping Pain Relief

Quick take: Hip pain while you’re side‑sleeping is common in pregnancy and usually comes from hormone‑driven ligament loosening and the growing belly shifting your pelvis. Most women find relief by adjusting their sleep posture, using supportive pillows, and choosing a mattress that cushions pressure. If the pain is sharp, worsening, or accompanied by fever, leg swelling, or loss of movement, contact your provider right away.

It’s 2 a.m., you’ve rolled onto your side for the third time, and that familiar ache in your right hip feels louder than the baby’s kicks. You glance at your phone, scrolling through endless advice, wondering whether you’re doing something “wrong” with your sleep set‑up. You’re not alone—many expectant mothers notice a new, sometimes nagging, hip discomfort as the weeks go by.

First, breathe. Hip pain in pregnancy is usually a normal response to the body’s amazing transformation, not a sign that you’re failing as a mom. In this article we’ll unpack why the hips hurt, which side‑sleeping positions are safest, how to arrange pillows, what mattress and pillow choices work best, gentle stretches and strengthening moves, and the red‑flag symptoms that mean it’s time to call a professional. By the end you’ll have a clear, step‑by‑step plan to ease the ache and get a better night’s rest.

Why does my hip hurt when I sleep on my side during pregnancy?

The short answer: hormonal changes, joint laxity, and the shifting weight of a growing baby all combine to put extra stress on the hip joint when you lie on your side. The hormone relaxin, which peaks in the first and second trimesters, loosens ligaments throughout the pelvis so the pelvis can expand for delivery. While essential for birth, relaxin also makes the hip joint a bit “wigglier,” reducing its natural stability.

At the same time, your uterus expands upward and forward, pulling the pelvis forward (a movement called anterior tilt). This tilt tilts the hip socket, increasing pressure on the outer (lateral) side of the hip when you lie on your side. The added weight of the baby (often 10–15 lb by the second trimester) compresses the sacroiliac joint and the surrounding muscles, leading to soreness that feels like a deep ache or a dull throb.

Other contributors include:

• Postural changes. As your belly grows, you may unconsciously hunch forward, straining the glutes and hip flexors.
• Pregnancy‑related edema. Fluid retention can make the soft tissue around the hip feel swollen, amplifying pressure.
• Previous injuries or pre‑existing hip conditions. A history of hip bursitis, arthritis, or a prior hip fracture can make the joint more sensitive to the new load.

Most of these factors are harmless, but they explain why a side‑sleeping position that felt fine in early pregnancy suddenly becomes uncomfortable by the 20‑week mark.

Best sleeping positions to relieve hip pain in the second trimester

Here are three side‑sleeping variations that keep the hips happy:

1. Left‑side with a knee‑hug. Place a firm pillow between your knees, aligning your hips and keeping the pelvis neutral. This reduces the shear force on the hip joint.
2. Right‑side with a “sandwich” pillow. If you must sleep on the right, stack a thin pillow under the hip that’s bearing weight, then another between the knees. The “sandwich” creates a gentle lift that distributes weight more evenly.
3. Half‑side (the fetal‑position tweak). Curl slightly toward your abdomen, pulling the upper leg in a gentle “C” shape. This opens the hip socket a bit, relieving pressure on the outer joint.

Regardless of side, keep your spine in a neutral line. Imagine a straight line from your head through your shoulders, hips, and knees. If you notice your back arching or your hips dropping, adjust your pillows until the line stays smooth.

When you’re in the third trimester, the left‑side position remains best, but you may need a larger pillow under the belly for added support. A maternity‑specific pillow that contours to the belly can keep the uterus from pulling the pelvis forward, decreasing hip strain.

How to use pillows for side sleeping hip pain relief while pregnant

Pillows are the most immediate, low‑cost tool you can employ tonight. The key is strategic placement rather than sheer quantity.

• Between‑knees pillow. A medium‑firm pillow (about 15 cm thick) placed between the knees aligns the hips and reduces friction on the outer hip. Choose a pillow that doesn’t flatten completely; memory‑foam or a rolled‑up towel works well.
• Under‑belly pillow. For left‑side sleepers, a C‑shaped or U‑shaped pregnancy pillow cradles the belly, keeping the pelvis from tilting forward. If you don’t own a full‑size maternity pillow, a regular body pillow positioned lengthwise under the belly can do the trick.
• Hip‑support pillow. A small, firm pillow (or a folded blanket) placed directly under the hip that’s bearing weight lifts the pelvis slightly, decreasing the load on the hip socket.
• Back‑support pillow. If you tend to roll onto your back during the night, a pillow placed behind your back can prevent you from rolling over, keeping you in the side position.

Here’s a quick set‑up you can try tonight:

1. Lie on your left side.
2. Place a firm pillow under your belly, hugging the curve of your uterus.
3. Slide a medium‑firm pillow between your knees.
4. Put a small, rolled‑up towel under the right hip (the one on the ground) for a gentle lift.
5. Adjust the pillows until you feel a smooth line from shoulder to hip.

Experiment with pillow thickness. If the hip still aches, try a slightly thicker pillow under the hip or a thinner one between the knees. The goal is to distribute weight evenly without creating new pressure points.

Safe hip stretches for pregnant women experiencing side sleeping discomfort

Gentle stretching can improve hip flexibility, reduce muscle tightness, and ease the ache that builds up overnight. Always move within a comfortable range—never push into sharp pain. Below are three doctor‑approved stretches you can do safely after a warm shower or before bedtime.

Supine Figure‑Four Stretch

• Lie on your back with knees bent, feet flat on the floor.
• Cross your right ankle over your left knee, forming a “4.”
• Gently press the right knee away from you, feeling a stretch in the right hip and glute.
• Hold for 20–30 seconds, then switch sides. Repeat 2–3 times.

Side‑Lying Hip Flexor Stretch

• Lie on your left side, supporting yourself on your forearm.
• Slide your right leg forward, bending the knee so the foot rests flat on the floor.
• Gently press your hips forward, feeling a stretch in the front of the right hip.
• Hold for 15–20 seconds, then repeat on the opposite side.

Standing Pelvic Tilt

• Stand with feet hip‑width apart, hands on your hips.
• Inhale, allowing your belly to expand forward.
• Exhale, gently tucking your pelvis under (a slight “tuck”) and engaging your lower abdominal muscles.
• Repeat 8–10 times, moving slowly.

These moves keep the hip joint mobile without over‑loading the ligaments softened by relaxin. For sciatica‑related hip pain, the Figure‑Four stretch is especially helpful because it opens the piriformis muscle, which can compress the sciatic nerve.

Can hip pain be a sign of pregnancy complications?

Most hip aches are benign, but certain patterns warrant a closer look. If the pain is accompanied by any of the following, it could indicate a complication that needs medical evaluation:

• Sudden, severe pain. A sharp, stabbing sensation that doesn’t improve with rest may signal a pelvic fracture (rare) or a deep‑vein thrombosis (DVT).
• Fever, chills, or flu‑like symptoms. Combined with hip pain, these could point to an infection such as septic arthritis.
• Leg swelling or discoloration. Swelling, especially in one leg, can be a sign of DVT, which can spread to the hips.
• Loss of movement. If you can’t straighten or bend the hip without intense pain, a more serious joint issue may be present.

In most cases, hip pain is simply a mechanical issue, but you should discuss any of the above signs with your provider promptly. A quick ultrasound, blood work, or physical exam can rule out serious problems.

What mattresses are best for reducing hip pain for pregnant side sleepers?

The mattress you sleep on can either magnify hip pressure or act as a natural cushion. While personal preference matters, research from the International Sleep Products Association and guidelines from the American College of Obstetricians and Gynecologists (ACOG) suggest the following mattress characteristics for pregnant side sleepers:

If you already own a soft, plush mattress, consider adding a firm mattress topper (about 2‑3 cm thick) made of dense foam or latex. This can raise the overall firmness without replacing the entire bed.

For the budget‑conscious, a good quality foam mattress (around 8‑10 inches thick) can work well, especially when paired with a supportive pillow‑top. The key is to test the mattress by lying on your side for at least 10 minutes; you should feel a gentle cradle around the hips without a “bottom‑out” sensation.

When should I see a doctor for hip pain during pregnancy?

Most side‑sleeping hip discomfort resolves with pillow adjustments and gentle stretches. However, you should schedule a prenatal visit if any of the following occur:

• Pain is sharp, sudden, or worsening despite rest.
• It’s accompanied by fever, chills, or a feeling of illness.
• There’s swelling, redness, or warmth in the leg or hip.
• You notice a loss of range of motion, such as being unable to lift the leg without severe pain.
• Hip pain appears before the second trimester and is persistent, suggesting a pre‑existing condition that may need specialist care.

During the appointment, your provider may order an ultrasound to assess the joint, evaluate for gallbladder or urinary issues that can refer pain to the hip, or refer you to a physical therapist specializing in prenatal care.

Difference between hip pain and pelvic girdle pain in pregnancy

Hip pain and pelvic girdle pain (PGP) can feel similar, but they originate from different structures and often require distinct management strategies.

• Location. Hip pain is usually localized to the outer hip or groin, radiating to the thigh. PGP typically centers around the sacroiliac joint (the back of the pelvis) and may spread to the buttocks, lower back, or inner thighs.
• Trigger. Hip pain often worsens with side‑lying, climbing stairs, or crossing legs. PGP is frequently aggravated by standing on one leg, turning in bed, or lifting the baby.
• Movement patterns. Women with PGP may notice a “clicking” or “popping” sensation in the pelvis, whereas hip pain usually lacks these joint sounds.
• Treatment focus. Hip pain benefits most from pillow support, hip‑specific stretches, and strengthening the glutes. PGP often requires a pelvic support belt, targeted physiotherapy, and core stabilization exercises.

Because both conditions can coexist, a thorough assessment by a prenatal physical therapist can help you target the right interventions.

Pregnancy hip pain remedies you can try tonight

Beyond the pillow set‑up and stretches already described, here are a few quick remedies that many pregnant side sleepers swear by:

• Warm (not hot) compress. Apply a warm towel or heating pad on a low setting for 10–15 minutes before bed to relax tight muscles.
• Cold pack. If the hip feels inflamed, a brief (10‑minute) cold pack can reduce swelling.
• Gentle massage. Using a small amount of pregnancy‑safe lotion, massage the outer hip in circular motions for a minute or two.
• Supportive footwear. Wearing low‑heeled shoes with good arch support during the day reduces hip strain that can carry over to night.
• Hydration and electrolytes. Staying well‑hydrated helps prevent muscle cramps that sometimes masquerade as hip pain.

These simple tweaks can be added to your nightly routine without much effort, and they often provide noticeable relief by the next morning.

Side sleeping pillow for pregnant women: Choosing the right one

Pregnancy‑specific side pillows come in several shapes—U‑shaped, C‑shaped, and J‑shaped. Which one is best for hip pain?

• U‑shaped pillow. Wraps around the entire body, supporting the belly, back, and hips simultaneously. Ideal if you prefer a single “all‑in‑one” solution.
• C‑shaped pillow. Supports the belly and hips while leaving the legs free, allowing you to adjust leg positioning more easily.
• J‑shaped pillow. Focuses on the belly and hips, with an extra leg extension for the lower leg. Good for women who find the U‑shaped pillow too bulky.

When shopping, look for a pillow that is firm enough to hold its shape but soft enough to contour to your curves. A removable, washable cover is a plus for hygiene. Many brands recommend a pillow height of 12–15 cm for optimal hip elevation.

Exercises to strengthen hips during pregnancy

Strengthening the muscles around the hip joint (glutes, hamstrings, and hip abductors) provides better support for the loosening ligaments. Below are three low‑impact moves you can incorporate into a prenatal fitness routine, ideally 3‑4 times per week.

Clamshells

• Lie on your left side with knees bent at a 90‑degree angle, feet together.
• Keeping feet touching, lift the top knee upward while keeping the hips stacked.
• Hold for 2 seconds, then lower. Perform 12–15 repetitions on each side.

Standing Hip Abduction

• Stand tall holding onto a chair for balance.
• Shift weight onto your left leg, slowly lift the right leg out to the side, keeping the knee straight.
• Lower without letting the foot touch the ground. Do 10–12 reps per side.

Bridge

• Lie on your back with knees bent, feet hip‑width apart.
• Press through your heels to lift hips toward the ceiling, squeezing the glutes.
• Hold for 3 seconds, then lower. Complete 10–15 repetitions.

All three exercises engage the hip stabilizers without over‑stretching the ligaments. If you experience any sharp pain, stop and consult your prenatal care provider.

Sleeping on left side hip pain relief

When you consistently sleep on your left side, you’ll notice reduced pressure on the right hip, which often bears the brunt of the body’s weight shift. To maximize relief:

1. Place a firm pillow under your belly to prevent the uterus from pulling the pelvis forward.
2. Insert a pillow between the knees to keep the hips aligned.
3. Use a small, rolled‑up towel under the right hip for a gentle lift.
4. Keep a thin pillow behind your back to stop you from rolling onto your back during the night.

These adjustments keep the hips in a neutral, supported position, which can dramatically cut nightly discomfort.

From our medical team: Hip discomfort is a common part of pregnancy, but it doesn’t have to dominate your nights. By combining the right sleep posture, pillow arrangement, and gentle movement, most women find relief within a few days. If pain persists, a referral to a prenatal physical therapist can provide individualized hands‑on guidance and a tailored exercise program.

Myth vs. fact

Myth: You must avoid sleeping on your side if your hips hurt.

Fact: Side sleeping is still recommended; the key is to use pillows to support the hips and keep the pelvis aligned.

Myth: All pregnancy pillows are the same and will automatically cure hip pain.

Fact: Pillow firmness, shape, and size matter. Choose a pillow that matches your body size and provides firm support where the hip contacts the mattress.

Myth: Hip pain always means a serious problem.

Fact: In most cases it’s a benign response to hormonal and mechanical changes, but sharp, sudden pain or accompanying symptoms should be evaluated promptly.

Key takeaways

• Hip pain while side‑sleeping is usually due to relaxin‑induced ligament laxity and the shifting weight of a growing baby.
• Sleep on your left side, using a firm pillow under the belly and a pillow between the knees to keep hips aligned.
• Choose a medium‑firm mattress or add a dense foam topper; pregnancy pillows can help but must be firm enough to support the hips.
• Gentle stretches (Figure‑Four, hip‑flexor, pelvic tilt) and strengthening exercises (clamshells, bridges) safely improve hip stability.
• Red‑flag symptoms—sharp pain, fever, leg swelling, or loss of movement—require prompt medical evaluation.
• Supportive footwear, proper hydration, and nighttime warm/cold therapy can further ease discomfort.

Frequently asked questions

Is it normal to have hip pain while pregnant?

Yes, most pregnant people experience some degree of hip discomfort, especially when side‑sleeping, because hormones and the expanding uterus change the mechanics of the pelvis.

What causes hip pain when sleeping on your side during pregnancy?

The main causes are relaxin‑induced ligament laxity, increased pelvic tilt, and the added weight of the baby compressing the hip joint when you lie on your side.

Can a pregnancy pillow help with hip pain?

It can, if the pillow is firm and shaped to support the belly and hips. A C‑shaped or U‑shaped pillow that lifts the hip and keeps the pelvis level often provides the most relief.

Should I avoid sleeping on my side if my hips hurt?

No. Side‑sleeping remains the safest position for blood flow. Instead, adjust your pillow arrangement to support the hips and keep the pelvis neutral.

When should I contact my doctor about hip pain in pregnancy?

Reach out if the pain is sudden or severe, if you develop fever, swelling, redness, or if you lose the ability to move the hip comfortably.

Are there any safe stretches for hip pain during pregnancy?

Yes. The supine Figure‑Four stretch, side‑lying hip‑flexor stretch, and standing pelvic tilt are all gentle, doctor‑approved moves that relieve tension without stressing the ligaments.

When to call your doctor

If you experience any of the following, call your healthcare provider immediately: sudden sharp hip pain, fever or chills, swelling or redness in the leg or hip, loss of movement, or pain that interferes with daily activities despite using pillows and stretches. This information is for education only and does not replace personalized medical advice.

References

1. American College of Obstetricians and Gynecologists (ACOG). “Physical Activity and Exercise During Pregnancy and the Postpartum Period.” Practice Bulletin No. 249, 2023.
2. National Health Service (NHS). “Pregnancy and the Pelvic Girdle.” Updated 2022.
3. World Health Organization (WHO). “Relaxin and Pregnancy.” Clinical Guidelines, 2021.
4. Mayo Clinic. “Pregnancy pillow: How to choose and use one.” 2023.
5. Royal College of Obstetricians and Gynaecologists (RCOG). “Managing pelvic girdle pain in pregnancy.” 2022.
6. International Sleep Products Association. “Mattress firmness and pregnancy sleep quality.” 2022.
7. Center for Disease Control and Prevention (CDC). “Pregnancy complications: Deep vein thrombosis.” 2023.
8. American Physical Therapy Association (APTA). “Prenatal exercise guidelines.” 2022.