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Published on: 7/14/2026

Why does hip pain radiate down the leg, especially at night?

Hip pain that radiates down the leg is often caused by sacroiliac joint dysfunction or nerve compression, such as sciatica. These conditions can worsen at night due to prolonged pressure on the joint or nerve while lying down, reduced movement, and inflammation that builds up during periods of rest.

Because hip and leg pain can stem from many overlapping causes—ranging from muscle strain to nerve or joint disorders—identifying the root cause quickly is essential for choosing the right treatment. A free, instant, online symptom check can help you clarify what may be behind your pain, understand possible conditions, and decide on the best next steps, whether that's home care, seeing a specialist, or seeking urgent evaluation.

Reviewed for medical accuracy: 07/14/2026

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Explanation

Hip pain that spreads down the leg can be caused by problems in the sacroiliac joint or nerve issues. The sacroiliac joint is where your spine connects to your pelvis, and problems here can cause pain to travel down the leg. This is explained in the research by Murakami and colleagues.

Why It Hurts More at Night:

  • At night, you might notice the pain more because you are lying still and are more aware of it.
  • Changes in position while sleeping might also put pressure on the nerves or joints, making the pain worse.

Nerve Problems:

  • Another reason for leg pain is nerve issues, like femoral neuralgia. This can happen after certain injuries or trauma, as explained by Hallett and colleagues.

If you are worried about your symptoms, you can use Ubie's free AI symptom checker to help identify possible causes and determine whether you should seek medical attention.

(References)

  • Murakami E, Aizawa T, Kurosawa D, & Noguchi K. (2017). Leg symptoms associated with sacroiliac joint disorder and .... Clinical neurology and neurosurgery, 28410481.

  • Hallett JW Jr, Wolk SW, Cherry KJ Jr, Gloviczki P, & Pairolero PC. (1990). The femoral neuralgia syndrome after arterial catheter trauma. Journal of vascular surgery, 2335836.

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