Hip pain that travels down the leg at night is most often caused by nerve compression in the lower spine, irritation of the tendons around the hip joint, or arthritis that worsens with prolonged stillness. The nighttime piece matters because lying down changes the pressure on your spine, hips, and nerves in ways that standing and walking don’t. Several distinct conditions can produce this pattern, and they each feel slightly different.
Why Hip and Leg Pain Gets Worse at Night
During the day, movement keeps your joints lubricated and your muscles actively supporting your spine. When you lie down and stay still for hours, fluid can pool around inflamed joints, stiffening them. Your body’s natural anti-inflammatory hormone, cortisol, also drops to its lowest levels in the early morning hours, which means you lose some of the chemical buffering that keeps pain in check while you’re awake.
Sleep position plays a major role. Side sleepers are particularly prone to hip pain because of direct pressure on the hip joint. Even the opposite hip can hurt if it falls forward and strains the surrounding muscles and tendons. Back sleepers may notice more radiating leg pain if their lower spine flattens against the mattress and compresses a nerve root. In either case, the lack of position changes during deep sleep means the same structures stay under load for long stretches.
Sciatica and Lumbar Nerve Compression
The most common reason hip pain shoots down the leg is compression of the sciatic nerve or the nerve roots that form it in the lower spine. This is called lumbar radiculopathy, and it typically produces a line of pain, tingling, or numbness that runs from the buttock down the back or outer side of the thigh, sometimes reaching the calf or foot. The sensation can be burning, electric, or deep and aching.
Several structural problems in the spine can squeeze these nerve roots. A herniated or bulging disc is the most frequent culprit: the cushion between two vertebrae shifts out of place and presses directly on a nerve. Bone spurs from osteoarthritis can narrow the small openings where nerves exit the spine, a process called foraminal stenosis. Thickened spinal ligaments can do the same thing. All of these tend to feel worse at night because lying flat can increase pressure inside the disc space or shift the spine into a position that closes down those nerve openings even further.
People with spinal stenosis (a general narrowing of the spinal canal) often notice that bending slightly forward provides relief. That’s a useful clue: if curling into a fetal position at night helps your leg pain, spinal narrowing is a likely contributor.
Greater Trochanteric Pain Syndrome
If the pain is centered on the bony point at the outside of your hip and spreads down the outer thigh rather than the back of the leg, the problem is more likely in the hip itself than the spine. Greater trochanteric pain syndrome (sometimes still called hip bursitis) involves irritation of the tendons and fluid-filled sacs around the outer hip bone. It’s one of the most common causes of lateral hip pain, especially in women over 40.
This condition flares at night because lying on the affected side compresses the already irritated area directly against the mattress. Even lying on the opposite side can aggravate it if the top leg drops forward, stretching the tendons over the bony prominence. The pain is usually a deep ache at the hip that can refer partway down the outer thigh, but it rarely travels below the knee. That’s an important distinction from sciatica, which frequently extends into the lower leg.
Arthritis of the Hip Joint
Osteoarthritis inside the hip joint itself tends to cause groin pain or deep front-of-hip pain, but it can also refer pain into the thigh and occasionally down toward the knee. At night, the joint stiffens after hours without movement, and the loss of cortisol’s anti-inflammatory effect lets swelling build. People with hip arthritis often notice the worst pain when they first roll over or get out of bed, then a gradual loosening after a few minutes of walking.
If your pain is in the groin or deep inside the hip crease rather than in the buttock or outer hip, and it radiates down the front of the thigh, hip joint arthritis is worth investigating. An X-ray can usually confirm or rule it out.
Nerve Entrapment in the Thigh
A less common but easily overlooked cause is compression of the lateral femoral cutaneous nerve, a condition called meralgia paresthetica. This nerve runs through the groin area and supplies sensation to the outer thigh. When it gets pinched, typically by tight clothing, weight gain, or prolonged positions that press on the groin, it produces burning, tingling, or numbness on the outer thigh. There’s no weakness involved, just uncomfortable skin sensations.
Nighttime flares happen when sleep positions put sustained pressure on the nerve’s path through the groin. The key difference from sciatica is the location: meralgia paresthetica stays on the front and outer thigh and doesn’t travel below the knee. It also doesn’t cause muscle weakness in the leg.
How to Tell These Conditions Apart
- Pain down the back of the leg to the calf or foot: most likely sciatica from lumbar nerve compression.
- Pain on the outer hip and partway down the outer thigh: likely greater trochanteric pain syndrome, especially if lying on that side makes it worse.
- Deep groin pain radiating to the front of the thigh: suggests hip joint arthritis.
- Burning or tingling on the outer thigh only, no weakness: points toward meralgia paresthetica.
These patterns overlap, and more than one condition can be present at the same time. Imaging and a physical exam are the most reliable way to sort them out.
Sleep Positions That Reduce Nighttime Pain
Changing how you sleep can make a meaningful difference while you address the underlying cause. For sciatica, back sleeping with a pillow under your knees promotes good spinal alignment and keeps the lower back from arching excessively. A small pillow under your neck and head (but not your shoulders) helps keep everything neutral. If you prefer your side, sleep on the side opposite the pain and place a pillow between your knees. This aligns the hips and takes pressure off the pelvis.
For spinal stenosis specifically, a slightly flexed position often helps. Sleeping in the fetal position with knees curled up, or elevating the head of the bed with a wedge pillow, bends the spine gently forward and opens the narrowed nerve channels. A reclining chair or adjustable bed frame accomplishes the same thing.
For greater trochanteric pain syndrome, avoid sleeping on the affected side entirely. A pillow between the knees prevents the top leg from dropping forward and straining the outer hip tendons. Some people also benefit from a soft mattress topper to reduce pressure points.
When Radiating Leg Pain Is an Emergency
Rarely, a serious condition called cauda equina syndrome can cause lower back pain with leg symptoms. This happens when the bundle of nerves at the base of the spine gets severely compressed, usually by a large disc herniation. The warning signs that distinguish it from ordinary sciatica are sudden difficulty urinating or controlling your bowels, progressive weakness in one or both legs, and spreading numbness in the inner thighs, buttocks, or groin area. These symptoms require an emergency room visit immediately, because permanent nerve damage can result if pressure on the nerves isn’t relieved quickly.