Something is moving in my knee, should I worry?

[Atticus_J]

Hello!
When I move my right knee, something "twangs" or "twitches" on the outside. It started two days ago after finishing a hike with steep declines and seems to happen most with lateral movement. I can see it move when I lay down and bend my knee slowly and it appears to be a tendon (or vein or nerve maybe) passing over a bone. There is no sound when this happens. It does not hurt, but it is uncomfortable and my knee feels a little weak (although this may be in my head). It does not seem to be getting better or worse since I noticed it. I am a 26-year-old man and lead an active lifestyle mostly by exercising in the gym and walking most places (in fact I had done an intense leg workout the day before hiking). Although I sit for long stretches as part of my work. Should I be worried about this or can it go away by itself?
Thank you!

[CHIN_C]

It might be a good idea to rest and avoid any activities which trigger the pain for at least 6 weeks.

[CHIN_C]

An accurate diagnosis requires clinical history and physical examination.
You should see your doctor for further workup and evaluation.
Consider entities such as iliotibial band syndrome:
https://www.webmd.com/pain-management/it-band-syndrome
https://www.aafp.org/afp/2005/0415/p1545.html

[Paxiled]

Who knows?  If it doesn't hurt or impede your movement any, wait and see.  If it starts to hurt or impede movement in any way, might be time for an exam.  There is a tendon there that is a common problem as you age if you're very active, the patella tendon.  Ever seen all those folks at the gym with that thin strap underneath their knee?  That's for patella tendon pain.