High prolactin will increase the risk of breast cancer, but not necessarily get breast cancer, need to be different from person to person. The dangers of increased prolactin can affect the endocrine system, which commonly increases the risk of breast cancer, as well as insulin resistance, sexual dysfunction in the reproductive system, in addition to irregular menstruation, amenorrhea and infertility in female patients. Finally, it can also affect the nervous, motor and immune systems. The main function of prolactin is to promote the growth and development of mammary glands to maintain breastfeeding during lactation, and increased prolactin will lead to milk overflow; it can also affect the growth and development of follicles, which will lead to irregular menstruation and even cause sexual dysfunction, which is manifested as decreased libido in women and erectile dysfunction in men. If the patient is examined for prolactin increase, should actively under the guidance of the doctor for symptomatic treatment, to avoid serious consequences.