A painless snap during a leg raise is often caused by a tendon moving over a bony area. It has a name — snapping hip — and it's usually harmless.
The short version
- A tendon flicking over a bony ridge is one common cause of hip snapping, but not the only one.
- Painless snapping is estimated at around 5–10% of people, and far more common in anyone who repeatedly takes their hip through big ranges.
- If there's no pain, nothing needs doing.
- Pain deep in the groin, catching, or a hip that locks is a different pattern worth having assessed.
Why it happens
Your hip is a ball sitting in a socket, and it's crossed by several thick tendons — the strong cords that join muscle to bone. Some of them pass over bony ridges. When you lift your leg, a tendon can be sitting on one side of a ridge at the start of the movement and the other side by the end. As it crosses over, it flicks, and you get a click or a clunk. This is one common reason for a hip to snap, but it is not the only possible cause — clicking can also come from inside the joint or from other tissues.
Which tendon depends on where you feel it, though location alone can't confirm the cause. A snap at the front of the hip, near the groin, may come from a hip-flexor tendon that runs down from the front of the pelvis — that's the one most often felt during leg raises, though deep groin clicking can also come from within the joint. A click on the outside of the hip is usually a thick band of tissue moving over the bony point you can feel there. There's a version at the back involving the hamstring tendons too, but it's less common.
The reassuring part is how ordinary this is. Painless snapping is estimated at around 5–10% of people generally, and it's far more common in anyone who repeatedly takes their hip through big ranges. In one study of elite ballet dancers, over 90% reported snapping in the hip — but only around half of those found it painful. Painless snapping is often harmless and does not usually need treatment. Get advice if pain, catching or loss of function develops.
That said, "clicking" isn't always the same thing as "snapping". A click that comes with pain deep in the groin, or a hip that catches or briefly locks, is a different pattern and worth having assessed rather than assumed.
⚠️ When to see a doctor in person
Get medical help the same day if the hip is hot, swollen and red and you feel feverish, if you can't put weight on the leg after a fall, or if the leg goes cold, pale or numb.
- Clicking comes with pain deep in the groin, or the hip catches or briefly locks up
- The leg is genuinely weak or giving way, or it's getting steadily worse over weeks
- It follows a twist, fall or sporting injury, or you can't bear weight even without visible swelling
- Persistent night pain, or pain alongside feeling unwell
- In a child or teenager: snapping that's painful, causes a limp, limits sport, or follows an injury
Starter exercises
Only worth doing if the clicking bothers you or comes with some ache. If it's painless, you can skip this section entirely.
Stand side-on to a wall. Cross the leg nearest the wall behind the other. Lean your hip towards the wall until you feel a stretch. Skip if it worsens the snapping or pain.
Lie on your back, cross the sore-side ankle over the opposite knee, and pull that thigh towards you. Optional — should not reproduce deep groin pain.
Lie on your back, knees bent, feet flat. Push through your heels and lift your hips to a straight line, squeezing your buttocks. Lower slowly.
Mild stretch or a light working feeling is fine. Sharp pain, or pain deep in the groin, means stop.
Progression note
If the snapping is sore, try temporarily reducing the specific repeated movement that sets it off — long stints on a bike, lots of leg raises, repeated deep hip bending — and keep up comfortable general activity while you build hip strength. Add reps to the bridge before adding load, and give it a few weeks. If it's still painful after that, a physiotherapist can work out which structure is snapping and adjust the plan.
The bottom line
A painless snapping feeling during leg raises is often caused by a tendon moving over bone, and this is common enough to be considered a normal variation. But painful catching or locking can have other causes. Nothing needs doing if it doesn't hurt. If it does, reducing the irritating movement for a while and gradually building comfortable hip strength may help — and pain deep in the groin, catching, or a hip that locks deserves a proper look.