What You Need To Know About Alopecia

People are talking about the condition after an Oscars ceremony joke about Jada Pinkett Smith's hair. Here's what everyone should keep in mind.

The biggest moment from the Oscars on Sunday put Jada Pinkett Smith’s alopecia front and center, when Best Actor winner Will Smith slapped comedian Chris Rock after a joke about Pinkett Smith’s shaved head.

Pinkett Smith has spoken openly about her experience with alopecia, recalling the “terrifying” moment she first begin losing “handfuls of hair.” The condition is why she began shaving her head, and still does.