TRPM8 is a non-selective cation channel that functions as a primary cold and menthol sensor in peripheral sensory neurons 1. The channel is activated by menthol, a selective TRPM8 agonist, and by cold temperatures, allowing calcium and other cation influx across the plasma membrane 2. TRPM8 exhibits desensitization through direct calcium binding, which stabilizes a nonconducting state and mediates sensory adaptation to sustained cold or menthol exposure 34. Beyond thermoreception, TRPM8 contributes to multiple physiological processes including pain modulation and tear production 5. As a topical agent, menthol acts through TRPM8 activation to desensitize nociceptors, providing analgesia for various painful conditions 2. TRPM8 dysfunction is implicated in cold allodynia, migraine pathogenesis (particularly in meningeal afferents), dry eye disease, and prostate cancer 61. Genome-wide association studies have linked TRPM8 variants to migraine susceptibility 6. Clinically, TRPM8 agonists show therapeutic promise: acoltremon, a TRPM8 agonist, was FDA-approved in 2025 for dry eye disease treatment by increasing tear production 7. Conversely, TRPM8 antagonists may benefit cold hypersensitivity and certain pain disorders, suggesting personalized therapeutic approaches depending on the underlying pathophysiology 1.