Normally, nipples are kept supple from the secretions of the Montgomery tubercles in the areola. They can become sore when they are excessively dry or wet, which makes them crack or fissure. The purpose of this study was to investigate the effect of peppermint water versus expressed breast milk on cracked nipple among lactating women. Methods: A quasi-experimental design was utilized. Sample: Purposive sample of 90 lactating women Setting: The study was carried out in postnatal ward and postnatal clinics at four settings in Menoufia governorate: