What causes should we consider for hypnagogic/ hypnogogic “hallucinations”?

In another article on this website, we discussed what hypnagogic and hypnagogic “hallucinations” are, and how they differ from dreams and “true” hallucinations. Please see the following article on this website: How are hypnagogic/ hypnogogic “hallucinations” different? On this page, let’s discuss what potential causes we should consider if one of our patients has hypnagogic…