What Causes Feeling Of Hair Stuck In The Back Of Throat?

Quick question: For the last like 2 or 3 weeks I've felt like I have a hair caught in the back of my throat. Not a sore throat and no coughing or difficulty swallowing or breathing, just more of a constant slight irritation. It feels to be on the top of my throat, around the entrance to my sinuses I think. It does not seem to be getting worse or getting better.

Anything to be concerned about? Thanks!

-Mike