Diabetes mellitus is a metabolic disease characterized by an increase in blood sugar levels that cause vascular complications and circulatory disorders. Hot and cold water soaking in the feet can increase blood flow and blood vessel pumping. Objective: to assess the effect of hot and cold water soaking in the foot blood circulation in patients with diabetes mellitus. Methods: A quasi-experimental was conducted with pre-test and post-test approach with control. Respondents were 35 people per group by consecutive sampling. Data were analysed using Wilcoxon signed ranks test and the Mann Whitney Test. Result: there was a significant effect between the average value of Ankle Brachial Index before 0.823 (SD 0.025) and after treatment 0.95 (SD 0.95), p-value = 0.00. The mean difference was obtained p = 0.00, if the p value <0.05, there was a significant difference in the difference in the mean value. Conclusion: it was found that the leg blood circulation was getting better after the hot cold water soaking. It is recommended for nurses to make hot and cold water immersion into one of the independent nursing interventions in providing nursing care to diabetes mellitus patients.