Jan 24, · Both boys and girls may develop newborn acne, between about 3 to 4 weeks of age. When newborns have breast buds, real, mature breast tissue forms, creating firm lumps under the nipples. Some babies even leak some real milk from their breasts.
Most girls have their growth spurt at a younger age than boys do. The fastest rate of height growth usually occurs in girls between when breast buds start to develop and about 6 months before they get their period. Once a girl has had her first period, her growth has already started to slow down.
It's normal for newborn babies (boys and girls) to have mild or even swollen, enlarged breasts and/or lumps under the nipple. They are almost always benign and due to exposure to maternal hormones Author: Steven Jerome Parker, MD.
I have read that newborns (boys and girls) may secrete drops of milk from their nipples as a result of the hormones in their mother's breast milk. My 3 week old baby girl has not produced drops of milk, but there are small lumps of tissue under her nipples that are fairly firm, almost like tiny developing breasts. Is this normal? How long do you expect that it might last?