Michael had his first nose job in 1979 after falling and breaking his nose when he was rehearsing.
He was doing a dance routine and fell.
That is something only him and his surgeon(s) would know.
In 1978, Michael Jackson starred as the Scarecrow in the musical, The Wiz. In 1979, he broke his nose on the set during a complicated dance sequence that resulted in his first rhinoplasty operation...
He got one when he was 27 because he wanted to be more photogenic. personally, i dont think it worked.