I am a E4 with a BASD of 04-21-2005 and I have been a E4 since 11-01-2006. Can I go to the board?...if not how much longer do I have to wait? Am I eligible for promotion in the SZ zone yet? Also how does the SZ zone work?
So if you pluck one grey hair from the follicle, it will never grow back more than one grey hair in its place. But the best choice is to cut the grey or white hair, and not pluck, since plucking can damage the hair follicle and perhaps no hair will grow from it again.
The medical name for the sudden whitening of the hair is canities subita. The best explanation for it is not that the hair changes colour, but that the pigmented hairs fall out. A condition called alopecia ariata causes the hair shed suddenly, resulting in bald patches.