Not me but DD (16).
I've noticed she's developed big areas of discoloration under her arms, which are becoming very obvious.
She shaves under her arms on pretty much a daily basis - she can't wax as she's a dancer and in a sleeveless leotard every day so couldn't manage the regrowth.
Her skin under her arms is quite sensitive and can break out so I buy her Dove or Nivea sensitive deodorants.
Any way to get rid of it?