The aim of the study was to determine the effect of tea tree oil and coconut oil applied to the nipples during the early postpartum period on nipple crack formation.

This randomized controlled experimental research included a total of 90 women in the research sample abiding by the research criteria, with 30 each in the intervention groups (coconut oil or tea tree oil application) and 30 in the control group. Women in the intervention groups applied coconut oil or tea tree oil to the nipples on the 3rd, 7th and 10th days postpartum, while the control group did not have any intervention

Inclusion Criteria:

• Mothers who volunteered for participation, h
• aged from 18-45 years,
• with new and live birth after 37 weeks,
• without flat or small nipple problems,
• without previous breast operations,
• able to apply correct breastfeeding methods and with infants with birth weight of 2500 g and above were included in the study.

Exclusion Criteria:

• Mothers who could not breastfeed,
• had stillbirth,
• who had infants with congenital anomalies preventing breastfeeding were not included in the study.