my daughter has just had a baby 2wks old. during pregnancy a lump was found in her breast quite large and diagnosed a sticky cyst benign.  it does have to be removed she has been told but since giving birth it has become very large, should she be worried? she also has a fibrous cyst in the other breast again benign and will be removed as soon as she can.
HIT hank for asking to ChatDoctorI really appreciate your concern for your daughter looking to the history given here I could say that nothing to be done for what the baby is having until and unless medically proven emergency and extremely necessary to excise the lesion in my opinion better to have an opinion form the pediatric surgeon, hope this information helps you have a nice day.