Enlarged areola may be caused by pregnancy, higher level of estrogen and other conditions, which are mostly considered as normal physiological phenomena. 1. Pregnancy: Usually after pregnancy, the hormone level in the body will change, and under the influence of hormone changes, the areola will often become bigger, although the hormone level in the body will return to normal after giving birth, and the areola of the mother can be appropriately narrowed, but it can not be restored to the pre-pregnancy period. 2. Higher levels of estrogen: For women with higher levels of estrogen, nipples, areola and labia minora will be blackened, and with melanin deposition, some patients can also be manifested as enlarged areola, which is mostly seen in puberty. At the same time, some endocrine diseases, such as ovarian tumors, pituitary tumors, etc., will also be manifested as increased levels of estrogen will make the areola larger. It is recommended that women with enlarged areola is generally a normal physiological phenomenon, if accompanied by uncomfortable symptoms, it is recommended to consult a regular hospital in a timely manner, and standardized treatment under the guidance of the doctor.