There are many reasons for the pain inside the nipple pull of the breast, such as trauma, endocrine disorders, pregnancy, nipple inflammation and so on. 1. Trauma: Breasts and nipples are delicate organs, and if they are hit by external forces, they may cause trauma, which can lead to pain inside the nipple pull of the breast. 2. Endocrine disorders: prolonged late night, irregular diet, poor mood, etc., can cause endocrine disorders, so some patients will appear in the phenomenon of breast nipple pulling inside pain. 3. Pregnancy: After pregnancy, the progesterone and estrogen in the body gradually rise, so it may promote the development of breasts, thus appearing nipple pulling pain inside the breast. 4. Nipple inflammation: the nipple suffers from bacterial invasion, which can induce an inflammatory reaction, thus leading to nipple redness, swelling and enlargement, thus appearing breast nipple pulling inside pain. At the same time. Breast nipple pulling inside pain may also be seen under normal circumstances caused by excessive pulling, breast hyperplasia, breast ductal tumors, peri-mammary eczema and so on. There are many reasons for nipple pulling pain, after the symptoms, it is recommended to go to the hospital in a timely manner to improve the examination, follow the doctor’s instructions to take standardized treatment, do not take care of the treatment, so as not to lead to adverse consequences.