Nipple pain around the 1st to 3rd month of pregnancy is generally normal, but not all pregnant women experience the symptom and there is some individual variability. If the pain is unbearable, it is recommended to consult a doctor in time to identify the cause and treat the symptoms. The symptom of nipple pain occurs around 1 to 3 months of pregnancy, mainly because during pregnancy, the pregnant woman’s body secretes a large amount of estrogen to stimulate the development of mammary ducts, and secretes a large amount of progesterone to stimulate the development of mammary gland follicles. Pregnant women with early pregnancy reaction, there will be the beginning of breast enlargement, congestion obvious, nipple swelling and pain, nipple enlargement and blackening, areola color deepening and other phenomena, generally belong to the normal physiological phenomenon. In addition, early pregnancy reaction may also have dizziness, fatigue, loss of appetite, nausea, vomiting, anorexia greasy, like to eat acid, gastrointestinal flatulence, constipation, frequent urination and other symptoms.