Eleven eumenorrhoic patients presenting galactorrhea were subjected to a three-month Bromoergocryptin therapy (2.5 mg/os/die). Prolactin Circadian Rhythm, performed on all patients, showed four hyper and seven normoprolactinemic cases. The mammary condition was studied, before and after treatment, through clinical examination, mammary cytology and thermography. Hyperprolactinemic patients responded positively to the therapy, showing subjective, clinical and thermographic improvement. Conversely, normoprolactinemic patients, though showing a noteworthy improvement of symptomatology and galactorrhea, did not respond equally well from the objective and thermographic points of view.