Erythromycin ointment is useful if the nipple is cracked. You can choose to apply erythromycin ointment under the guidance of a doctor, erythromycin ointment has an anti-inflammatory effect, mainly for superficial wounds. Erythromycin ointment has a good anti-inflammatory and bactericidal effect, is a macrolide antibacterial drug, has a good bactericidal effect on most gram-positive cocci. It can play a certain role in the treatment of many wounds, and erythromycin ointment will not cause too much skin irritation. However, erythromycin ointment will have a drug-resistant situation, once used too many times, the human body will have resistance to it, which will lead to a decline in the therapeutic effect, and should be changed to other drugs under the guidance of the doctor when the efficacy is found to decline. And erythromycin ointment can not be used for eyes and oral mucosa, nasal mucosa and other mucous membrane parts. After using erythromycin ointment externally, if local erythema, papules and itching appear, the drug should be stopped immediately and the local medicine should be washed away. In daily life, patients should eat a light diet, avoid spicy stimulation, avoid water at the wound, which can help the wound to heal as soon as possible, and the wound must seek medical treatment in time if it does not get better.