Erythromycin ointment usually needs to be applied 2 times a day for severe cracked nipples. This is because the severity of the crack is related to the broken area of the nipple, serious infection, and so on. It is recommended not to blindly self-medication, should go to the hospital for diagnosis, and then according to the results of the diagnosis for targeted treatment. In serious cases, the breakage area is large and there are signs of inflammation, such as obvious pain, skin temperature increase, etc., need to be used together with anti-inflammatory drugs, such as amoxicillin capsules, cefdinir tablets and so on. When using erythromycin ointment, it is recommended that the medication be administered through doctor’s orders to avoid adverse reactions and effects. At the same time in the use of the period if the recovery effect is not achieved, need to go to the hospital for further examination, according to the results of the examination and then targeted treatment.