Do these when it's not really aggrivating. I woudlnt let something like this go on for a long period, it can get pretty annoying to treat after 10-20 years like os many people do.
And of course if it gets worse goto Emergency, urgent or another doc.
Occasionally the odd crack when turning or bending it, I can't remember if the sound/feeling is more pop or click like.
I'm 26, I weigh 165, and it doesn't tend to hurt at specific times really.. It doesn't keep me up at night or anything.
The pain would be mostly in he back of the knee , on the outer half of my knee, and occasionally a little dull pain above my kneecap in front
I've been dealing with the same thing for the past couple of seasons. Long story short I ended up with more knee problems and making routine visits to PT. Pretty much what I learned is it's over use of the tendons and ligaments. Pretty much they swell, strain, and seize up.
The treatment is rest, healing, then re-strengthening. Icing after activity helps with the short term healing and will get you through the rest of the season. But I've been warned that if I don't rest it and let it heal the elasticity will be replaced by a hard, stiff scar tissue.