What age does acne start is it a sign of puberty?

i have lately noticed my almost 10 year antediluvian having some white head on her nose is this commonplace and what should we do to rectify the situationWhat age does acne start is it a sign of puberty?
it is normal..our son only just turned 9 and he gets them around his hairline..but he also wear a hat alot so we are thinking from sweat...but he is getting them..my daughter who is immediately 13 didnt get her first one till she be 12 then her facade exploded.get some facade wash for acne and guide him good frontage washing behaviour now....
Just depends on the age - puberty hits children at different ages. Buy her some facial rinse out and astringent and teach her how to be responsible for her complexion. Getting pimples can be a sign of puberty for females and males. But remember that acne and pimples are different things.
different ages and yes some people perceive that it is