I have got geographic tounge out of no where , read can be from ebv but tested neg for mono.. is it hard to detect ?

Geographic tongue affects about 1% to 3% of people. It is benign, which means it’s harmless. It isn't linked to an infection or cancer. The problem often resolves on its own but may appear again at a later time. You can read this article from Mayo Clinic - https://www.mayoclinic.org/diseases-conditions/geographic-tongue/symptoms-causes/syc-20354396 - Take care.