A training bra not only gets one in the habit of putting on something extra in the morning... but also will keep bouncing nipples with new nerves from jiggling about. Any time between age 9-17 is totally normal for this phase of development. Just like walking or talking, there's a "normal" range. And your DD sounds comfortably in it.
If she's developing quickly, a few other things will help as well:
- Training bra (to reduce pressure on nerves)
- Ibuprofen (for inflamation)
- Stretchmark cream (just like pregnant bellies, breast skin has to stretch like crazy as well)
One thing to know... universally, throughout the world... girls entering puberty tend to tack on 10-30lbs of "pudge". Some EXTENSIVE studies have been done on this overseas in socialized med countries / aka 1st world countries (hundreds of thousands of participants over 30-50 years) and a really COOL thing has been found:
- Girls who diet (or who are made to diet) during this 12-18 mo period struggle with their weight until menopause.
- Girls who do NOT diet, the weight melts off over a 30-90 period the first year they start bleeding WITHOUT ANY EFFORT (aka, no diet or increased exercise)... and do NOT struggle with their weight throughout their lives.
Since you're entering this period... just wanted to give you a heads up.
((You don't find these studies HERE, because we don't have the money for it. A "big" study in Sweden has 100,000 -500,000 people in it... and a "long" study lasts for 2-3 GENERATIONS. A "big" study in the US has 6,000 people in it and lasts for 5 years. So our medical profs and scientists depend on studies from countries where *real* big and long studies can take place.))