Men have nipples because they form in the womb before a baby’s biological sex is even determined. During the first several weeks of development, all embryos follow a similar blueprint that includes the creation of mammary tissue and nipple buds. It is only later in the pregnancy that specialized genes and hormones like testosterone trigger the development of male-specific traits.
Because these structures are established so early, they remain on the body even though they do not develop into functional, milk-producing breasts for men. In the medical world, they are often considered vestigial, meaning they are remnants from our earliest stages of growth that no longer serve a primary purpose. However, this tissue remains sensitive to hormonal changes and can occasionally be affected by the same health conditions that impact female breast tissue.
It is important to remember that while male nipples are typically non-functional, they are still a natural part of human anatomy. You should monitor the area for any unusual lumps, nipple pain, discharge, or skin changes. If you notice anything out of the ordinary, please consult a primary care physician or a specialist like a general surgeon for an evaluation.