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Background: High-intensity focused ultrasound (HIFU) and monopolar radiofrequency (MRF) are common treatment modalities that have shown significant results in skin tightening. Nevertheless, the novel combination of these two treatments is new to the Malaysian landscape. Thus, this study aims to investigate the safety and efficacy of this novel combination treatment for the Malaysian population. Methods: This retrospective study included data on HIFU and MRF combination therapy for skin tightening collected from an aesthetic clinic in Johor Bahru, Malaysia from June 2018 to May 2021. Efficacy was assessed using the Global Aesthetic Improvement Scale (GAIS) and Glogau classification, while the safety of the treatment was analysed using pain scores and adverse events (AEs). Results: A total of 56 patients with a mean age of 47.7 years old (SD 10.00) were included in this study. The majority of the patients had Fitzpatrick skin types III and IV. Most of the patients were Chinese, followed by Malay, Indian and others. Most patients (96.4%) showed clinically significant improvement in skin tightening after treatment, with 15 patients scoring 1 (very much improved) and 39 scoring 2 (improved). All patients reported transient mild erythema, with no serious AEs, such as burn, swelling, numbness or muscle weakness. Among the patients, 80% reported a pain score of 5, while 10% reported pain scores of 4 and 6. Conclusion: Combining HIFU with MRF therapy improved GAIS scores by 96.4%, indicating a secure and efficient skin-tightening method. Transient erythema was shown to be the most common side effect of this combination. [ABSTRACT FROM AUTHOR]