Why Does My Hip Hurt More at Night?

Key points

• Sleeping on your side compresses the structures of the outer hip. It is the most common trigger for hip pain at night.
• Inflammation from conditions like arthritis tends to get worse at rest, causing stiffness and aching overnight.
• Hip pain 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 show alignment problems that lying-down scans 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 long, still positions you hold during sleep. The most common causes are tendon compression on the outer hip, bursa inflammation, joint wear from arthritis, and pain referred from the lower back or pelvis.

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

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

Most hip pain at night has a mechanical or inflammatory cause and gets better with the right guidance. But some patterns need a closer look, and a few need urgent care.

If you are not sure whether your symptoms need tests, our guide on when to see a specialist can help you decide.

Why does sleeping on my side make hip pain worse?

Side sleeping puts 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 steady compression restricts blood flow to the area and triggers pain.

If you usually sleep on one side, you may notice the pain is always in the same hip. A pillow between your knees can reduce the compression slightly. But it does not address why the area has become sensitive in the first place.

The load your hip carries during the day also plays a part. 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 warning signs I should not ignore?

Yes. Most hip pain at night is not dangerous, but some symptoms need urgent medical attention rather than a scan. Contact your doctor straight away, or go to your nearest emergency department, if you have 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 put weight on the leg.
• Unexplained weight loss along with worsening hip pain.
• A hot, red, swollen joint with fever.

These symptoms can point to serious conditions that need prompt assessment by a doctor.

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

It can show alignment problems that lying-down scans miss. When you lie on an X-ray table or inside an MRI scanner, gravity is taken away and your muscles relax. The pelvis can then settle into a neutral position. This may hide a tilt, a rotation or a leg-length difference that puts extra load on one hip all day.

A standing EOS scan captures your skeleton upright, exactly as it works when you walk, stand and carry weight. It shows how your spine, pelvis, hips and legs relate to each other 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 and lying-down 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 how you sleep can reduce pressure on the hip overnight while you find out the underlying cause.

• Pillow between the knees. If you sleep on your side, a firm pillow between your knees stops 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 gives the best balance.
• Avoid crossing your legs during the day. Crossing your legs out of habit can tighten the outer hip structures, making them more sensitive at night.

These steps can ease symptoms, but they do not replace 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 specialist the information needed to plan the right next step.

Before you start a treatment, or change the one you are on, it is worth getting a detailed diagnosis. Whether the cause sits in the pelvis, the legs or the spine changes what will really help.

Frequently asked questions