There are many small particles around the nipple may be pathological or physiological, as follows: 1, Montserrat nodules, is a normal physiological structure, only during pregnancy and lactation will open, if stimulated will stand up like goose bumps; 2, sebaceous gland blockage, long time without cleaning, sebaceous glands secrete a lot of material gathered to block the gland, need to wash the breast often, regular replacement of underwear; 3, The particles formed by milk coagulation, the milk flowing from the breast hole during pregnancy or breastfeeding is not wiped off in time and remains around the nipple coagulated into small particles, wash the nipple with warm salt water to prevent infection; 4, papules formed by nipple allergy, contact with poor quality underwear and fake skin care products lead to nipple allergy, grow a lot of papules accompanied by pain, itching, should be replaced with good quality underwear, stop using fake and shoddy products, and at the same time Anti-allergy treatment should be carried out.