White granules on the nipple may be caused by a blockage of the opening of the milk ducts during breastfeeding or by overflow of milk during non-lactating periods, although skin disorders can also cause white granules on the nipple. 1. Breastfeeding: If there are white granules on the nipple during breastfeeding, it may be caused by a blockage of the opening of the milk ducts, and the milk is stagnant down there. 2. Non-lactation: If white granules appear on the nipple during non-lactation, it can be considered to be related to breast milk overflow. Breastfeeding is the secretion of a small amount of milk from the breasts, and the small amount of milk secreted will pool on the nipple, resulting in the white particles. 3. Skin diseases: white granules on the nipple should also be considered and rashes, eczema and other skin diseases, skin diseases, may also be accompanied by obvious itching sensation. Different causes, the specific treatment will be different, it is recommended that the patient to the hospital in a timely manner.