The reason for the appearance of grains around the nipple is the following: 1. During pregnancy, due to the increased influence of estrogen and progesterone, the breast follicles and lobules of the mammary glands proliferate and develop, making the breasts larger, and the sebaceous glands around the areola also begin to hypertrophy, forming many nodule-like elevations. This is because the nipples are not fully open and form small white dots. 2. Nipple infections in the breast can also lead to small nodules in the breast. 3. The majority of nodules are physiological and do not require special treatment, mainly to maintain local cleanliness, more cleaning nipples, avoiding the secretion of oil blocking the ducts and pores of the breast, there will be significant improvement, it is not recommended to use violence to squeeze the nipple.