Why do I get hip pain from sitting cross-legged?

Cross-legged sitting is an asymmetric pose: one hip is rolled outward and stretched, the other is compressed into the chair, and both are held there far longer than any stretch you would do on purpose. Hold a tissue in position for an hour and it complains - not because it is damaged, but because sustained load without movement starves it of the position changes it expects. The NHS's hip pain guide lists the common culprits for this kind of ache - sprains, strains, and tendon problems after repetitive load - and notes pain and stiffness that are worse after not moving, which is exactly the stand-up-after-a-long-sit stiffness cross-legged sitters know. MedlinePlus adds a useful detail: hip trouble is often not felt over the hip itself but in the groin, thigh, or even the knee, so a cross-legged habit can present as a grumbling outer thigh or a groin pinch rather than obvious hip pain. The mechanics favour the outside of the hip in particular - the tendons and the fluid cushion over the bony point of the hip dislike sustained compression, which is why the ache often concentrates there and can echo when you lie on that side at night. The fixes are behavioural, not medical: stop holding any single position for more than 20 to 30 minutes, alternate which leg crosses, sit with both feet flat for parts of the day, and add some glute-strengthening work - strong hip muscles tolerate sitting habits far better. See a GP if the pain persists despite a few weeks of position changes, wakes you at night, or comes with locking, giving way, or a limp. Pymander is a free AI doctor, 24/7 by text, that can help you sort posture from problem.