Hallucinations-visual Images That You See Vividly, Though They Don't Really Exist. They Can Be Very Disturbing. These Hallucinations May Occur As Sleep Begins Or As It Ends And You Are Waking. Medical Conditions
Below is a list of potential medical conditions this symptom could be a sign of.
Narcolepsy is a sleep disorder. If you have narcolepsy, you may suddenly, uncontrollably fall asleep at any point during the day...What is Narcolepsy?