The granular tissue protrusion around the nipple, called Montgomery’s nodule, is a sebaceous gland around the nipple and areola that serves mainly to protect and lubricate the nipple. Normally, the nodules are not obvious, but only when the hormone level increases after pregnancy, the mammary glands start to increase blood circulation and prepare for the postpartum lactation period, then there will be obvious granular protrusions around the areola, which are the nodules. If there is no obvious redness, swelling or discomfort, this granular bump is a normal phenomenon and does not require medical treatment. If the granular bump has local redness, swelling and pain, it is recommended to go to a regular hospital to avoid inflammation caused by sebaceous gland blockage, and to pay attention to good hygiene around the nipple and areola.