Abstract:Objective:To investigate the changes of blood glucose in patients with diabetes mellitus after a single dose of local analgesia with betamethasone, and to analyze the related factors. Methods: Pain and DM patients who received nerve block with betamethasone from January 2020 to April 2021 were included. The visual analogue scales (VAS), fasting blood glucose (FBG), fasting blood glucose (BBG) were analyzed before and after treatment, and the influence on the changes of blood glucose by age, gender, BMI, diabetes duration, location of injection and basal glucose control in patients were explored. Results: After treatment, VAS scores decreased significantly(P<0.001). Fasting and bedtime blood glucose increased by 2.93±3.94mmol/L and 3.78±3.96 mmol/L respectively (P<0.001), and decreased the next day with the changes of -1.23±2.67mmol/L and -1.41±4.19mmol/L respectively(P<0.05). Univariate and multivariate analysis showed that diabetes duration was the influencing factors of FBG fluctuation, while gender was the influencing factor of BBG fluctuation. Conclusion: Local administration of analgesia with betamethasone may cause transient fluctuation of blood glucose in diabetic patients. Clinical attention should be paid to monitoring the blood glucose levels, especially for patients who are females and have long diabetes durations.