Abstract: Objective: To combine the different perspectives of patients and medical staff, examine the reason of hindering self-management of diabetic foot patients, in order to provide reference for prevention and control measures in diabetic foot. Methods: The phenomenological research method was used, and semi-structure interview was conducted among 22 medical staff and patients. Colaizzi method was used for content analysis. Results: According to the Theory of Planned Behavior (TPB), 7 themes were extracted in 3 categories: ①Behavioral attitude: negative self-management caused by hopelessness of disease treatment, and lack of awareness of self-management caused by cognitive deviation. ②Subjective norms: social environment was insufficient to the disease, and limited support from family environment for disease control. ③Perceived behavioral control: self-management knowledge was limited, self-management was lacking, and self-management objective conditions were bound. Conclusion: The maintenance of self-management in patients with diabetic foot is affected by multiple factors. Nursing staff should improve patients' behavior intention by changing their subjective cognition, relieving pressure, and providing the necessary objective conditions, improving the patient's self-management ability and compliance.

Key words: diabetes foot; self-management; plan behavior theory; qualitative study