What have I tweaked & do I stretch or rest?

[Eve]

Have googled & not finding anything.

have tweaked something at the gym , just above knee but on the left side ( not quite on the inside)

guess a muscle or tendon but feels like it’s 1 particular spot.

Vastus medialis pain? There’s a diagram if you scroll down the link, is this where you mean?

https://www.kinfolkwellness.com.au/blog/2019/5/4/pain-on-inside-of-knee-get-to-know-your-vmo