If you’ve ever wondered, “Why can’t I fall asleep?” or “What causes insomnia?” you’re not alone.

Insomnia affects millions of people and can appear in many forms—including difficulty falling asleep, waking up during the night, waking too early, or feeling exhausted ndespite spending enough time in bed.

While many people assume insomnia is simply a sleep problem, it’s often connected to stress, anxiety, nervous system activation, health conditions, lifestyle habits, and emotional patterns.

In this guide, we’ll explore the most common causes of insomnia and what you can do to begin restoring healthy sleep.

For the full sleep anxiety roadmap, read Sleep Anxiety Help.