5wo and knee clicks

I've just noticed that my DD left knee makes a click noise (like when you crack a nuckle). It is not every time it bends but maybe every 3rd or 4th. Hubby thought he heard a click a few weeks ago and as she was checked for clicky hips in hospital I figured was hearing things. Plus I've mistaken noises before and realised was my braclet tapping on the change table but today i heard it and when I hold DD left knee and bend it up and down I can feel and hear the click.

What could this be??????

I see the clinic nurse next Wednesday but thought I'd ask if anyone might know or have encountered before..

I cant help you but id be interested to know too. My DD has clicky wrists, has had since birth. I havent had her checked out as i thought she would grow out of it and that it wasnt an issue but maybe i should.

I hope someone can help you out.

I've got a 6 week old and he has clicky hips and knees and i asked the midwife that comes out to the house and she said its just hormones and not to worry that it will eventually stop