Background: Diabetes mellitus is a chronic disease that may lead to serious complications, including diabetic foot ulcer. Adequate foot care is essential to prevent this complication, and patients’ knowledge of foot care is one of the factors that can influence their foot care behavior. Purpose: This study aimed to determine the relationship between foot care knowledge and foot care behavior among diabetes mellitus patients in the working area of Ujung Loe Public Health Center, Bulukumba Regency, in 2026. Methods: This study used a quantitative correlational design with a cross-sectional approach. Ninety respondents were selected using a purposive sampling technique. Data were collected using the Diabetic Foot Knowledge Scale (DFKS) and the Nottingham Assessment of Functional Footcare (NAFF) questionnaires, and were analyzed using the Chi-Square test with a significance level of α = 0.05. Results: Most respondents had a good level of foot care knowledge and good foot care behavior. The statistical test yielded a p-value of 0.000 (< 0.05), indicating a significant relationship between foot care knowledge and foot care behavior. Conclusion: There is a significant relationship between foot care knowledge and foot care behavior among diabetes mellitus patients. Health care providers are expected to strengthen foot care education so that patients can perform independent foot care to prevent diabetic foot ulcer.
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