So what are
the signs of
Normally, the first sign is when you develop the ‘breast bud’, which are basically small raised lumps behind your nipple area. Breast buds are made up of milk glands, tissue, fat and muscle and it's very normal for one to start showing before the other. It might also take a few months before the second breast starts to develop too.
They might also feel a bit tender, especially if they’re accidentally knocked. This is very normal as the breasts continue to develop over the next few years.
It's also not unusual for the nipple area to become a little sore and sometimes cracked. Don’t worry; rub a little cream in before you go to bed to prevent them from feeling sore or tender.