Am a bit concerned now as I mentioned to friends at a Virgin Vie party tonight that 10 year old DD seems to be developing boobs. Well one on the left side so I thought. She said she felt as if she had a bruise a couple of nights ago and when I examined where it was sore there was a definate raised lump. Only thing is that it is to the left of her nipple, not underneath it. The mums of the girls in the room all said that breast growth starts directly underneath the nipple. This lump is completely outwith the nipple. Now I am showing my ignorance. Should I get this checked out by the doctor or can breast development start in any area of the breast. She has no other signs of puberty.