13 yr old boy-lump behind one nipple?

[working3jobs]

just that really, he asked me about it tonight. one small lump behind right nipple, left flat as normal.
any ideas?
thanks.
ps. going to drs this week anyway so will ask then as well!

Breast bud? Very common.

I think in early puberty testosterone is converted to oestrogen and at this stage the levels of testosterone are not high enough to stop the effects.

ahh, was wondering if it could be hormonal, but wouldn't that affect both sides?
will investigate, thank you for helping out

Ds2 (16) had this quite a few years ago on both sides. It resolved on its own.

My DS1 had this at 12. Now 14 and gone as far as I know.

Took my ds to the GPs recently with exactly the same issue. It is very common and yes it is hormonal. It can come and go, affect one side or both, but nearly always is gone by early twenties.

If it becomes very noticeable they will ask you to go back, as they can treat it surgically, I think, but it is very very rare to need to do that.

HTH

ah, thanks everyone , reassuring to hear :)