A large areola is associated with genetics, breast duct tumors, breast tumors and other diseases. The size of the areola is also related to the level of estrogen and progesterone. The hormone level gradually increases not only the size of the breast area, but also the size of the areola and nipple, but the difference between the two is not too big for most people, so as long as there are no symptoms, no treatment is needed. If the nipple is damaged, bacteria may invade the ducts of the breast and cause ductitis, or papilloma may appear in the ducts of the breast and cause the ducts of the breast to expand, thus causing the areola to increase in size. If a breast tumor occurs in the areola or nipple area, when the tumor gradually increases, it will cause an enlargement of the areola on one side, so it is important to be alert and go to the breast surgery department of the hospital in time to confirm the diagnosis through breast ultrasound.