What can I do for underdeveloped breasts? (photo)

Generally, there is no pathology associated with underdeveloped breasts.  However, it may warrent investigation with an endocrinologist to make sure you don't have a hormone irregularity.  I would see your primary care physician first and see if an endocrine workup is necessary.

Thank you for your question and posting appropriate pictures.  There is nothing wrong with your breasts anatomically, they just happen to be too small for your liking. You actually seem to be a good candidate for breast augmentation.  Please look to have consultations with board-certified plastic surgeon and preferably undergo Vectra 3-D imaging simulation of your postop results.