"that feeling when Knee surgery is tommorow" Explaination

"That feeling when knee surgery is tomorrow" meme, also known as the Blue Grinch meme, expresses a specific emotional state associated with a pending knee surgery.

This real meaning of this meme is that, this joke is very specific thing to have a meme about. It's unlike the other Memes where the people universally feel same emotion for the meme.