It’s the classic insomnia complaint: you’re physically tired, but your brain won’t turn off. Lying in bed thinking about your to-do list, finances, or an awkward conversation is known as sleep-onset insomnia. Question: What makes my mind race only at night? Answer: During the day, distractions like work and activity keep your mind occupied. When you finally stop and lie down in a dark, quiet room, your brain takes that opportunity to dump all the worries and unresolved thoughts of the day. This spike in mental activity raises your heart rate and cortisol levels, making sleep impossible. Actionable Solutions for a Racing Mind