Small bumps on the edge of the nipple may be caused by Montgomery’s nodule, sebaceous cyst, mastitis and other factors. It is recommended that the patient go to the hospital in time to find out the cause of the disease and then follow the doctor’s instructions for treatment. 1. Montgomery’s nodule: Montgomery’s nodule is a normal structure, usually in the closure of the stimulation will be raised, in the breastfeeding or pregnancy due to the influence of hormones, there will be raised bumps, patients do not have to worry too much. 2. Sebaceous cysts: Sebaceous cysts may be formed due to infection or blockage without timely cleaning. Patients can wash their breasts every day, change clean and comfortable underwear, and undergo surgical excision if they do not disappear for a long time. 3. Mastitis: Mastitis caused by skin damage or bacterial infection of the breast tissue, patients should take medication, such as amoxicillin, erythromycin, etc., and usually eat more fruits and vegetables, eat less spicy and stimulating food. Small bumps on the edge of the nipple should also consider other factors such as tumors, in daily life, it is best to go to the hospital regularly for relevant examinations, you can also often check yourself, if you find some small bumps next to the nipple, you should go to the hospital in time to do the breast ultrasound as well as routine blood tests.