You don't mention how that diagnosis was specifically made - another differential (alternative, possible) diagnosis could be alopecia or alopecia areata.  Read up on it - it can occur spontaneously and it has no specific known cause (many theories).  Dermatologists usually diagnose it - so I would make sure that is not what is going on.  It is not life threatening or dangerous.  It does, however, cause anguish to patients when the hair loss on the scalp becomes multiple and significant.

There are coored powders you can match to your hair color that can mask the scalp bald spots - beauty supply stores have it.  Going bald is another option if you can "make peace" with it.