Breast hypertrophy is a manifestation of abnormal breast development, which can be categorized into gynecomastia, adult gynecomastia, and precocious breast hypertrophy. Each type of breast hypertrophy looks different and needs to be analyzed specifically. 1. Gynecomastia: Men’s breasts are larger than men’s breasts, and there may be a button like lump in men’s breasts with clear boundaries, which may be accompanied by pain and breast overflow. 2. Adult gynecomastia: It is characterized by sagging, enlarged breasts with loose skin, hyperpigmentation and varicose veins that can be seen with the naked eye, accompanied by nipple inversion. As the breasts are too enlarged, there may be itching and erosion in the sagging part of the breasts. 3. Precocious breast hypertrophy: the breasts of girls will be abnormally enlarged and look as big as adult breasts, and there will be deepening of the color of nipple areola, if there is a suspicion of breast hypertrophy. If you suspect that there is a manifestation of breast hypertrophy, you should consult a doctor in time to do a systematic examination and diagnosis.