Breastfeeding benefits, both infant and maternal health. When delivery takes place by cesarean section, the mother becomes a surgical patient with all the inherent risks and problems that may interfere with breastfeeding. Aim of the study: was to explore after cesarean section delivery, what are the factors influencing breast symptoms in breastfeeding women? Research design: A descriptive design was used to conduct the study. Setting: Postpartum department of maternity and preterm infants hospital, Zagazig university hospitals. Subjects: A purposive sample of 200 women underwent CS delivery. Tools of data collection: Four tools were used for data collection; an interview questionnaire consisted of three parts, a modified form of postpartum stress scale, a structured follow up record and scale for measuring the breast symptoms in breastfeeding women. Results: 67.0% of the sample exposed to breast symptoms which was significant with factors such as age, parity, in adequate preparedness to breastfeeding during pregnancy, delayed initiation, technique to breastfeeding and postpartum stress. Conclusion: After CS delivery, the most common breast symptoms from the highest to the lowest were breast hardening, breast pain as the baby sucks, unbearable breast pain which cannot be touched, breast engorgement and nipple cleavage. Moreover, several factors influenced increased breast symptoms as lower maternal age, decreased family income, primiparity, inadequate preparedness for breast feeding during pregnancy, delayed initiation of breast feeding postpartum, breast feeding technique (partial, decreased duration of feed, no switch of breasts, improper position of the nipple in baby mouth) and exposure to stress. Recommendations: The study findings can be used by physicians, nurses, and lactation consultants to help mothers overcome breastfeeding barriers. Key words: Cesarean section, Breast symptoms, Breastfeeding.