The areola does not get bigger during menstruation. The reason is that during menstruation, the estrogen and progesterone in the body will drop, which will cause the endometrium to retreat and bleed, clinically manifested as menstruation, so it will not have an effect on the areola. The areola becomes bigger and deeper in color, which only occurs when you are pregnant, mainly because the estrogen in the body increases thousands of times after pregnancy, which will make the nipple and areola appear coloring, and will also make the mucous membrane of the vulva and the labia minora appear coloring and darkening. Menstruation is a normal physiological phenomenon and does not cause localized changes in the breasts. If the local color of the areola deepens and pregnancy is ruled out, it is important to go to the hospital for the appropriate examination to rule out the possibility of local lesions.