My cat had it too as a kitten. The vet gave me a topical cream to put on the
spots 2 times a day for 2 to 3 weeks, or until it was gone, and it did go away
but you have to be vigilant about putting the medicine on. I got a spot too,
and no big deal - I bought a fungicide at the drugstore for ringworm (ask the
pharmacist) and it went away after a long time, but it did no harm. Just be
sure you use the medicine as directed.