When secondary to pregnancy, it may resolve itself without treatment after the pregnancy ends. Feelings For most women, having an unusual breast change is upsetting. Together with what Was thereupon Observed in Her Body". This can trap fluid in the breasts and cause swelling and lumpiness. Breast hypertrophy Specialty Gynecologyendocrinology Breast hypertrophy Abnormal boob natural a rare medical condition of the breast connective tissues in which the breasts become excessively large. European Journal of Abnormal boob natural Genetics.