Even though they're not based on real stimuli, these hallucinations can be auditory, visual, and tactile, often linked to recent experiences from the previous day.

"Hallucinations as you describe are really really common in teenagers. There are two types, one we call hypnagogic hallucination and hypnogogic hallucinations. What this means is that one occurs ...

For example, you may notice: It's also possible to experience hallucinations as you're trying to fall asleep, known as ...