It mean they are growing or your monthly cycle coming
Puberty causes breasts to grow fast to prepare you to have a child.
Female breasts stop growing and developing by age 18.
your fat
because they are growing
Genetics
because they are growing.
Are they growing?
no
There growing, or your hormones are at a high level.
no every one just grows at different rates.
No, there is no evidence that bras with underwires cause breasts to stop growing. Wired bras can cut into your skin and damage sensitive breast tissue if you wear the wrong size or one of bad quality.