Breast pain on one side is not an indication to determine pregnancy. After early pregnancy, due to the change of hormone levels in the body, there can be changes in the breasts, such as increase in areola, darkening of the color, and the discovery of enlarged Montgomery’s nodes around the areola, the symptom is more sensitive, and the gradual enlargement of the mammary glands can be detected, which can assist in diagnosing the symptoms of early pregnancy. The final diagnosis, need to check HCG or ultrasound, confirm the diagnosis of intrauterine pregnancy, pregnancy can appear drowsiness, eat more, more exclude greasy food, and even nausea, vomiting early pregnancy symptoms, the earliest diagnosis of pregnancy is found in the HCG significantly elevated and doubled every other day, or 7 weeks after menopause ultrasound examination, found intrauterine pregnancy. Pain in one breast, consider the symptoms of breast hyperplasia, make sure that the recent stress is not too much, can not be angry, if necessary, go to the hospital.