Prolactin 55ng/ml is higher than the normal range, you need to consult a doctor in time, according to the cause of the disease: physiological reasons can generally relax, active exercise; pathology should be actively treating the original disease; drug causes if a greater impact on the life of the doctor can consult the doctor to adjust the medication. Normal range of prolactin: 2.64-13.13ng/ml for men, 3.34-26.723ng/ml for women before menopause (<50 years old), 3.34-26.723ng/ml for women after menopause (>50 years old), 3.34-26.723ng/ml for women after menopause (<50 years old); Postmenopausal (>50 years old): 2.74～19.643ng/ml. Indicators may vary in different hospitals, so it is recommended to consult your doctor. 1. Physiological reasons: such as pregnancy, lactating women prolactin can be elevated, without special treatment. If it is caused by work pressure, depressed mood, etc., you can properly relax and actively exercise. 2. Pathological causes: due to pituitary microadenoma caused by elevated prolactin, can be treated with surgery. 3. Drug causes: such as oral contraceptive pills can cause elevated prolactin, if elevated prolactin has serious impact on life, you can consult your doctor to adjust the medication. If the effect is not big, you can consider regular follow-up observation. If there is any discomfort, it is recommended to actively seek medical attention.