In patients with severe breast fissures, erythromycin ointment can usually be applied 3-4 times a day, along with other treatments. The treatment of breast fissures, i.e. cracked nipples, is related to the size of the nipple break and whether there is a serious infection. If the area is small and there is no inflammation, the patient needs to keep the area clean and dry and can apply erythromycin ointment 3-4 times a day. If the breakage area is larger and there is inflammation, such as obvious pain, increased skin temperature, etc., anti-inflammatory drugs should be added, such as amoxicillin capsules. And if the inflammation is more severe and there is exudation of fluid from the nipple with significant edema and swelling, the patient needs to clean and disinfect the area and add intravenous antibiotic infusion treatment, such as ceftriaxone sodium, etc. In addition, if the patient develops the above symptoms during breastfeeding, it is recommended to stop breastfeeding in time. Milk can be sucked out with a breast pump and nursed with a bottle, and further consideration of breastfeeding can be given after the condition is completely relieved.