Thank you very much for the reply. I will book another appointment soon and mention these possibilities.

I did have a look at images of the condition you have mentioned and it does not resemble what I have. My spot is a single small white mark, perfectly round and the size of a regular spot you get on your face. It's only there for 12-18 hours and then completely disappears for 10 days or so.

The issue I have is that the chances are that when I visit the specialist there will be absolutely no mark there at all...

I might try using salt water a few times a day until I can get any medication perscribed.

Thanks again