I have discoid meniscus on my left knee diagnosed by a surgeon but after he told me the symptoms i think i have one on my right as well because sometimes i have that click but not a pop neither ones hurt which he said is rare but good ?

Need more info: You say you have a discoid meniscus diagnosed by a surgeon i think the best way to evaluate it would be to perform an mri i wouldn't diagnose the problem just by the sound it makes the fact that it doesn't hurt is good but does not mean it s not there or even a small tear? Check it out if youre concerned.

Leave it alone: A discoid meniscus is a variation of the normal lateral meniscus of the knee. If it is not causing any significant pain or functional problems, best recommendation is to leave it alone.