Mild breast enlargement without uncomfortable symptoms can be left untreated, and most of them return after menstruation. If it is accompanied by breast swelling, tingling and breast lumps, it can be treated with oral medications such as lactic acid and prophylactic pills. Under normal circumstances, breast tissue will be affected by the body’s hormone levels, cyclical growth and recurrence, most of the body’s hormone levels before and after ovulation to reach the peak of mammary gland hyperplasia, for the woman to conceive breastfeeding to make sufficient preparations. If there is no conception after ovulation, the breast hyperplastic tissues begin to regenerate and return to normal levels with the onset of menstruation. Symptoms of breast enlargement will improve significantly after menstruation is over, so follow-up observation is sufficient for mild breast enlargement, and most do not require medication. Only after the onset of menstruation, the symptoms of breast enlargement are still not relieved, further detailed examination is needed to exclude malignant lesions.