What is the reason for the different sizes of breasts?

Patient's question:

Main symptoms: A lump in one breast Onset time: A long time Laboratory test results: Unknown

Doctor's answer:

The breasts are uneven, with one being larger and the other smaller; one nipple protrudes while the other is slightly retracted, and so on. If this condition has always been this way and has not recently developed, and if there is no discomfort, then it is a normal phenomenon and there is no need to worry. If the breasts show significant asymmetry, there are several possible reasons:
First, congenital factors. During embryonic development, if one breast rudiment develops abnormally, the asymmetry between the two breasts will become apparent during puberty, with the underdeveloped side being significantly smaller than the healthy side. Generally, this does not affect marriage or fertility, but it does result in the loss of the unique feminine curves. Therefore, after breast development is complete during puberty, breast augmentation with implants can be scheduled to make the originally flat side as full as the healthy side, restoring a woman's grace and confidence.
Second, acquired factors. This usually occurs in postpartum women.