Gynecomastia is frequently brought on by an imbalance of the hormones estrogen and androgen. The hormone that regulates breast growth, estrogen, is typically only produced in small levels by men's bodies.Your breasts may grow if your body produces too much estrogen or if you have little testosterone (hypogonadism).
Gynecomastia can happen at many times, such as:
Birth: Male newborns have enlarged breasts, or breast buds, in more than half of cases.The mother's estrogen levels are to blame for this condition. Within a few weeks, the enlarged breasts usually go away.
Puberty: More than half of adolescent boys have enlarged breasts to some extent. Breast tissue expands as a result of fluctuating hormone levels, such as drops in testosterone and increases in estrogen. As hormone levels balance out, which can take anywhere between six months and two years, the condition gets better.
Adulthood: Men over 50 are more likely to have enlarged breasts. Men's bodies produce less testosterone as they get older. Additionally, they might have more body fat, which promotes the growth of breast tissue and estrogen production.