Good to get it looked at. 33 years ago I tore my left knee medial meniscus and had the damage trimmed out, no issues since with that side and a recent MRI showed that side to be in fine shape.
My left lateral side has been bothering me for years, and I had been stupidly dealing with (ignoring) that on my own. 4 weeks ago was walking down the stairs in my house and my left knee blew up - sounded like a gun going off. Complete tear (non-repairable) of the lateral meniscus. Surgeon's exact words were that I "shredded" my lateral side and he couldn't "sew together chicken salad". Had a meniscectomy on Aug. 31 and am still recovering, so far not the quick bounce back I'd been expecting.
Bottom line, get it taken care of as meniscus damage rarely gets better or heals on its own.