Introduction: Breast engorgement is a painful condition that affects a huge number of postnatal women. It is associated with unsuccessful breastfeeding, mastitis, and breast inflammation. So, there is a need to increase awareness regarding the efficiency of different nursing interventions as: warm compresses and cold cabbage leaves to treat breast engorgement. The aim of the study was to reduce the level of breast engorgement among the postnatal mothers and to compare the effect of warm compresses versus cold cabbage leaves on breast engorgement. Methods: A Quasi-experimental (equivalent pre-posttest group) research design was adopted. Setting: This study was conducted at postnatal ward and outpatient clinic at El-Manial Maternity hospital, Cairo Governate, Egypt. Subjects: A total of 90 postnatal mothers.They were randomly assigned into two groups (45 for each). Tools: Four tools were used to collect data; Maternal structured interviewing questionnaire, Six-points engorgement scale, Visual Analog Scale, and LATCH breastfeeding scale. Results: The mean age of the mothers was 26.6 ± 4.3 years old. More than twenty percent of each group suffered from firm and tender breasts (22.2% & 28.9%). Also, there was a statistically significant difference between the pre and post symptoms of breast engorgement, levels of breast engorgement, pain score, and engorgement score for both groups (p < .05*). Hence, both the interventions were effective in relieving pain and reducing breast engorgement. Conclusion: An application of cold cabbage leaves and warm compresses are effective for relieving breast engorgement. In addition, there was a statistically significant difference between the pretest and posttest of pain score and engorgement score for both groups (p < .001*). Recommendation: Nurses should be trained to include cold cabbage and warm compresses nursing approaches for managing breast engorgement in their discharge teaching plan. Also, prevention and early detection of breast engorgement should be done for all postnatal women.