Why Does My Hip Hurt More at Night?

Key takeaways

• Side sleeping compresses the outer hip structures and is the most common trigger for night hip pain.
• Inflammation from conditions like arthritis tends to worsen at rest, causing stiffness and aching overnight.
• Pain at the hip can be referred from the lower back or pelvis, so the source is not always where you feel it.
• A standing, weight-bearing scan can reveal alignment issues that lying-down imaging may miss.
• Sudden weakness, numbness, or loss of bladder or bowel control needs urgent medical attention, not a scan.

What causes hip pain when lying down?

Several structures around the hip can be irritated by the sustained, still positions you hold during sleep. The most common causes include tendon compression on the outer hip, bursa inflammation, joint wear from arthritis, and referred pain from the lower back or pelvis.

Understanding the difference matters because treatment depends on which structure is involved. If your hip pain and alignment have not been assessed together, the real cause can be overlooked.

How do I know if my night hip pain is serious?

Most night hip pain comes from a mechanical or inflammatory cause and improves with the right guidance. However, certain patterns deserve closer attention, and a few need urgent care.

If you are unsure whether your symptoms need investigation, our guide on when to see a specialist can help you decide.

Why does sleeping on my side make hip pain worse?

Side sleeping concentrates your body weight directly onto the bony point on the outer hip, called the greater trochanter. The tendons and bursa that sit over this bone are squeezed between it and the mattress for hours at a time. This sustained compression restricts blood flow to the area and triggers pain.

If you naturally sleep on one side, you may notice the pain is always on the same hip. Placing a pillow between your knees can reduce the compression slightly, but it does not address why the area has become sensitised in the first place.

Interestingly, the load your hip carries during the day also plays a role. If your pelvis sits unevenly when you stand, one hip takes more strain all day long. By the time you lie down, that side is already overloaded. This is why understanding your standing alignment is a useful step.

Are there red flag symptoms I should not ignore?

Yes. While most night hip pain is not dangerous, certain symptoms need urgent medical attention rather than a scan. Contact your GP, call 111, or go to A&E if you experience any of the following:

• Sudden numbness or weakness in your leg or foot.
• Loss of bladder or bowel control.
• Severe pain after a fall or injury, especially if you cannot bear weight.
• Unexplained weight loss alongside worsening hip pain.
• A hot, red, swollen joint with fever.

These symptoms can indicate serious conditions that require prompt assessment by a doctor.

Can a standing scan show why my hip hurts at night?

It can reveal alignment problems that lying-down imaging misses. When you lie on an X-ray table or inside an MRI scanner, gravity is removed and your muscles relax. This lets the pelvis settle into a neutral position, potentially hiding a tilt, rotation, or leg-length difference that puts extra load on one hip all day.

A standing EOS scan captures your skeleton upright, exactly as it functions when you walk, stand, and carry weight. It shows the relationship between your spine, pelvis, hips, and legs in one image, from head to ankle. If one hip sits higher, or the pelvis is rotated, the scan will show it. The difference between weight-bearing versus lying imaging can be significant for people with unexplained or long-standing hip pain.

EOS uses about 90% less radiation than a standard X-ray, around ten times less. The scan itself takes only a few seconds while you stand still.

How can I sleep better with hip pain?

Small changes to your sleeping position can reduce overnight pressure on the hip while you work out the underlying cause.

• Pillow between the knees. If you sleep on your side, a firm pillow between your knees keeps the top leg from dropping across the body and compressing the outer hip.
• Try your back. Lying on your back spreads the load more evenly. A thin pillow under the knees can take tension off the hip flexors.
• Mattress firmness. A mattress that is too firm pushes into the hip point. One that is too soft lets the pelvis sag. A medium-firm surface usually offers the best balance.
• Avoid crossing your legs during the day. Habitual crossing can tighten the outer hip structures, making them more sensitive at night.

These steps can ease symptoms, but they are not a substitute for finding out what is actually causing the pain. If your hip pain has lasted more than a few weeks, understanding your alignment through ScanAlign standing EOS imaging can give your treating clinician the information needed to plan the right next step.

Frequently asked questions