I think it may or may not be, just like many symptoms - you have to decide.
My husband has this form of dandruff. Where he has experienced hair loss, it is gone. Where he has fuller hair, he has the dandruff, were he experiences hair loss, he has no dandruff. Various things seem to aggravate it, but stress does not. The mind can create so many symptoms and often they can seem like “real” things.. I think it’s how much you stress over it, get frustrated, think about it that makes the difference.