Why do i get so hot when i sleep: The science of night sweats and overheating
Dr. Jonathan Pierce, PhD: Clinical Psychologist & Neuroscience Specialist
Dec 05, 2025 · 14 min read
You get hot in your sleep when your normal nighttime core-temperature drop of about 0.5–1.0 °C (1–2 °F) is disrupted, prompting the hypothalamus to open skin blood vessels and activate sweating to dump heat. The good news is that the trigger is often something changeable—like room setup, alcohol, stress, or a hormone/health issue—and the patterns ...