Male mammary gland development

Gynecomastia, also known as gynecomastia, gynecomastia, refers to the presence of unilateral or bilateral breast hypertrophy in men at different times and at different ages, with breast tenderness and palpable discs under areola Shaped nodules, nipple retraction and nipple discharge can be seen in some cases, and some of the appearance are similar to those of adolescent girls, so clinically they have also been named as adolescent breast hypertrophy, middle-aged and older breast hypertrophy, and idiopathic male breast hypertrophy.