Is it permissible to undergo breast augmentation surgery due to its small size and its effect on one's psychological well-being?

Cosmetic surgeries to remove a deformity that disfigures creation are permissible in Islamic law to remove harm, especially if the deformity causes injury, disfigurement, or illness, and deviates from the norm, as the questioner mentioned about her condition.

The basic principle is that it is not permissible to change the form of organs, but if an organ deviates from its usual created form, then the rules of "hardship brings ease" and "harm is removed" apply.

The operation should be performed by a woman if possible, and if the desired outcome can be achieved with medication without surgery, that is preferable.