The nodules are large sebaceous glands around the nipples. The main function is to secrete sebum to lubricate and protect the nipple and areola. When a woman is pregnant, her hormone levels are affected by the increase in estrogen and progesterone, and the nodules increase in size and appear as grains of flesh around the areola. It is also necessary to consider the rash caused by peri-areolar eczema, which is formed due to the stimulation of prolonged humidity and other reasons and manifests as localized itching discomfort, which can be significantly improved by symptomatic medication. Contact allergies around the nipples can also lead to a rash that occurs after wearing new undergarments and is accompanied by itching and discomfort. In either case, it is recommended to visit a doctor first for examination.