Introduction Breast care is one of the most neglected aspects of the postnatal care and the common maternity care. Exclusive breast milk is essential for the physical and mental development of the new born. The postpartum breast problem hinders the successful breast feeding. The incidence of maternal morbidity rate was 42.9% during puerperium. Most common cause for the morbidity is the breast problem. Breast feeding reduces the risk to mothers such as postpartum hemorrhage. Breast fed children are much likely become ill, especially when colostrum is given and breast feeding continued for first six month of life. But some of common problem related to breast feeding include breast engorgement, painful nipple, nipple infection, mastitis, breast abscess, lactation failure, poor milk production and incorrect feeding techniques leads to lactation problem in early neonatal period. Materials and Methods • Research approach and design: Quantitative approach with pre–test post–test control group design • Sampling technique: Purposive sampling technique. • Samples: The sample size was 40, 20 in experimental group and 20 in control group. • Tools: structured knowledge questionnaire, Bristol breastfeeding assessment tool Results: The data were analyzed using both descriptive and inferential statistics on the basis of the hypotheses of the study. The findings of the study shows that there was a significant increase in mean posttest knowledge score of the sample mean difference of( 5.0) with t value of (6.71) at 0.05 level ,which is greater than the calculated table value. Regarding the association between selected demographic variables and knowledge , practice of postnatal mothers breast feeding, there is no significant association between the selected variables with the knowledge and practice of post natal mothers. Hence it shows that planned teaching programme is effective in managing the postnatal breast complications Conclusion The findings of the study revealed that there was statistically significant difference in the pretest and post test scores in knowledge and practice of postnatal mothers regarding the breast feeding and management of postnatal breast complications. The present study indicated that the planned teaching programme on knowledge and practice regarding the breast problems and its management among postnatal mother is effective.