 [ Symptoms ] what causes breasts in an 8 year old my 8 year old grand daughter has breasts maybe aaa size her mom started buying her training bras a couple of years ago now she wears sport bras all the time is this normal is there a cure or can this be treated [ Disease ] hi your find its your and the rings hormones they can take 3 to 6 months before they get back to normal if your thinking of trying to get pregnant you should wait till you get back in a regular cycle then go for it do hope this helps you good luck