Has found out on the right breast, that under a papilla a small nucleolus. With what it mozhe...

[Anton of 13 years]

Has found out on the right breast, that under a papilla a small nucleolus. With what it can be connected?
Whether it is connected with teenage development?

[Elshanskij I.V.]

The swelling or turgescence of papillas at faces of a male during puberty is called as a gynecomastia and is the normal phenomenon.