White blisters on the nipples during breastfeeding are mostly due to incorrect breastfeeding habits and breastfeeding posture, resulting in nipple cracking and acute inflammatory changes. You should disinfect it locally with vital iodine, avoid piercing the white bubble, and apply erythromycin ointment or Bactrim ointment locally, suspend breastfeeding if necessary. If the white blisters persistently increase in size and become red and swollen, you should go to a regular hospital for breast surgery or general surgery in a timely manner and decide whether surgery is needed after a full assessment by a specialist. When breastfeeding, you should wear loose, breathable cotton underwear to avoid excessive pressure on your nipples, wash your nipples before and after breastfeeding to keep them locally clean, and eat a light diet in your daily life to avoid eating too much spicy and stimulating food.