Tens of thousands of viewers across the world watched in horror as Will Smith smacked Chris Rock in the face after he made a jibe about Jada Pinkett Smith's shaved head at the Oscars.
Jada, who was first diagnosed with alopecia in 2018, has been very open up about her decision to shave her hair off.
Alopecia is a medical condition that leads to hair loss. There are various types of alopecia including alopecia totalis, alopecia universalis, and alopecia areata.
