Toe nail has detached from one side and bottom - should I get it removed or leave it.

I'm with @primek and @kmakm Put some tape around it, provided you aren't sensitive to adhesive, and let nature take it's course. I had a toenail let loose about halfway down just after I had finished AC and it was one of the creepiest things I had to endure. I just wanted to rip it off, but didn't. If it goes in anyway manky (apart from being creepy) get thee to a physician. Mxx