The reasons for large nipples are considered as follows: first, it may be due to the blockage of the nipple outlet ducts during breastfeeding, which can cause swelling, redness and painful sensations in the nipples, and can be relieved by gentle massage; second, it may be due to the influence of genetic factors, resulting in larger nipples; third, it may be due to nipple lesions that lead to larger nipples, mostly seen in nipple polyps, chronic nipple inflammation, etc, Chronic nipple inflammation, etc. Fourth, it may be due to the influence of hormonal secretion; fifth, it may be a tumor lesion hyperplasia of the nipple, causing the nipple to increase in size, which needs to be identified as benign hyperplasia or malignant hyperplasia, benign hyperplasia can be followed up regularly, while malignant hyperplasia requires timely surgery. Considering that there are more causes for this symptom, it is recommended to go to the hospital for further examination and then to treat according to the examination results.