<p>Insecticide resistance constitutes a significant global challenge, threatening agricultural output and public health by reducing the efficacy of pest management strategies. Conventional genetic mutations are recognised as key factors in resistance; however, recent research highlights the critical role of epigenetic mechanisms, such as DNA methylation and histone modifications, in shaping adaptive responses to insecticides. This study analyses the processes by which epigenetic modifications affect gene expression without altering the DNA sequence, thereby enabling rapid and inheritable resistance phenotypes. This investigation suggests that DNA methylation can inhibit detoxification genes or activate pathways associated with resistance, whereas histone changes dynamically modify chromatin to regulate genes responsive to stress. Transgenerational epigenetic inheritance enables pests to pass on resistant qualities to their progeny, thereby complicating management measures. Understanding these pathways offers novel insights into the flexibility of resistance and challenges conventional models that concentrate solely on genetic alterations. The ramifications for pest management are considerable, suggesting that epigenetic biomarkers may improve resistance monitoring, while epigenetic-based therapies could provide innovative control tactics. This review advocates for a paradigm shift in pest management by integrating epigenetics into resistance studies, thereby enabling sustainable solutions to combat the escalating issue of pesticide resistance.</p>