Background:Effective postoperative discomfort management is an essential component to good quality of care, nursing a patient in discomfort is a challenging task requiring up-to-date knowledge, skilled interventions and attitudes that convey trust. Aim: Assess nurses' performance regarding postoperative discomfort among patients undergoing abdominal wall hernia repair. Subjects and Method: a descriptive research design was used. Setting: The study was conducted at the surgical in port said city (El-Zohoor Hospital and Port Said General Hospital)and Damietta. Subjects: A 6o convenient nurses participated in the study Tools: data were collected using three tools, Nurses' Knowledge questionnaire, observational check list for nurses' practiceand Nurses' attitude toward postoperative discomfort. Results: the result of study indicated that71.7% of the studied nurses had unsatisfactory knowledge, 83.3 % had satisfactory practice, 66.7% of them had negative attitude Conclusion: most of the studied nurses had unsatisfactory knowledge while majority of them had satisfactory practice and more than two third of studied nurses had negative attitude. Recommendations: there are obvious needs for conducted an in service educational and training programs to improve nurse's knowledge, practice and nurses' attitude regarding postoperative discomfort among patients undergoing abdominal wall hernia repair.