No specific type of hallucination is associated with mental illness.

Less common, but still affecting over 1 in 10 people, are hypnopompic hallucinations, which happen around the time of waking up and can resemble the continuation of a dream. My spiders might fall ...

hypnagogic or hypnopompic hallucinations during transitions into or out of sleep, respectively; sleep paralysis, where a person awakens but remains in rapid eye movement or dreaming sleep ...

The hallucinations experienced during sleep paralysis are either hypnagogic hallucinations, which occur when a person is ...