it's something i would call his pediatrician about. a physical exam can help rule out more serious causes of breast development in a boy and ease your mind. during puberty as in other stages of life it is not uncommon to see breast development in men. for example a newborn baby boy can have some degree of breast development which can be completely normal. its due to exposure to estrogen from the mother &/or the placenta during development. a health aging male can also have some degree of breast development and this would not necessarily signal a serious medical problem. these are settings in which the hormone estrogen stimulates breast development. about 40% of adolescent boys develop some degree of breast development. not to be confused with breast enlargement because of fatty tissue. you might see one or both breast develop or a boy might complain of breast tenderness. this usually resolves as the transition and hormonal changes of puberty are established. certainly take you son to see his doctor as there can be other more serious reasons for breast development in boys. and while a physical exam may help reveal the answer he may also need some type of breast imaging and blood test to help determine the cause.
my 12 year old son has some fatty tissue under his right nipple. should i bring him to the doctor? . my 12 year old son has some fatty tissue under his right nipple. it is swollen to the point that it can be seen. you can also feel a little hardness. should i bring him to the doctor or could it be just a pulled muscle?