I think we've seen about a thousand of these in our clinic (I think I posted
on this once before).The lump is most likely an extra breast if it does not
go down after nursing. Careful examination of the lump often reveals what mom
thinks is a mole as an underdeveloped nipple.  In most of the cases the lump
is bilateral as you describe but unilateral can also occur. Remember that
extra breast tissue, nipples or both can occur anywhere alone the "Milk Line"
Ruth Lawrence has a good diagram of the lines in her book.  Cabbage and Ice
are  recommended to dry the extra breast tissue up. It can be very painful
and in some moms takes a week or two to dry up. Moms complain that the
lump(s) interferes with arm movement, and bra straps also seem it cut into
the area.   Our breast surgeons like to remove these after lactation because
the area is difficult to feel on BSE because the tissue regresses under the
pectoralis muscle and it cannot be visualized on mammography. They almost
insist in cases where there is a strong family history of breast cancer.
If the lump changes with nursing (eg. softens and then returns) then most
likely it is merely a portion of the tail of Spence. In that case moist heat
and gentle massage might get things moving and prevent re-engorgement.
Marie Davis, RN,IBCLC

Hey I had my first normal temperature 98.7 F in two weeks. Everyday I see
progress. But still am very weak.