"Going white overnight," is feature of:
Ans. b. Alopecia areataAlopecia areata typically spares white or grey hair.Hence, if alopecia areata progresses rapidly; it will lead to this phenomenon called "going white overnight" as in a person with a mixture of grey and pigmented hair only grey hair is spared.
Vitiligo
Alopecia areata
Anagen effluvium
Albinism
General