It can. While breasts are developing and growing, they can be tender and sore, and that is perfectly normal.
when your 7 i started when i was 7
in general, about 10 -12 years old
they typically start growing sometime between the ages of 8 and 13.
When breasts start to grow and until they have stopped growing it can hurt in both nipples and breasts. Nipples get more sensitive but it all passes eventually.
Because they work off all the fat and then later on they start growing them
Female breasts stop growing and developing by age 18.
Birth control pills do not make your breasts grow.
because they are growing
you develop them when you start puberty you usually grow them when you are 10 or 11 years of age