The nipple invagination in baby boys is often a congenital problem, so no special treatment is needed for this condition. This symptom may also be temporary, because it is directly related to the baby’s development, some boys’ nipples just have not yet fully developed, so it will cause the situation of invagination, which is mainly due to the different physical reasons of each baby. In addition, nipple invagination may also be caused by the child’s breast development deformity, which is mainly due to the base of the nipple to hold up the role of the nipple is stunted, so it is difficult to support the nipple and lead to invagination. Other causes of breast invagination include breast tumors and scar pulling after breast inflammation surgery, but as long as it doesn’t affect your child’s life, nipple invagination is not a concern.