A picture would help to identify the problem.
White stuff could be glue or unvarnished spruce or something else. It might be caused by the fingerboard shrinking due to low humidity. If the ends of the frets stick out from the fingerboard, enough to feel the sharp edges, then that would be another indicator. But, the only way to be sure is to measure in the room with a hygrometer. A Caliber IV is often suggested, available online.
There is a risk of cracks forming if the humidity is low, do something soon.
"When I was younger, I could remember almost everything, whether it happened or not." Mark Twain