Sleep paralysis is the activity of the brain during sleep that causes the muscles to relax. This happens between the stage of wakefulness and the stage of sleep, and causes inability to speak and move the body for a few seconds or minutes. and stops on its own, or when someone touches or speaks to the sleeping person. Sleep paralysis usually starts during teenage years, but usually happens often at the age of 20s and 30s. This is normal, and not to be worried about. It is not a fatal medical issue.
“Isolated” sleep paralysis occurs when no other narcoleptic tendencies go along with it. Something is narcoleptic when it makes you sleepy and you can’t control it.
When isolated sleep paralysis keeps repeating, it is already a parasomnia, or a sleep disorder that involves abnormal movements of the body, uncontrolled emotions, and/or misbehavior during your sleep.
Isolated sleep paralysis makes a sleeping person feel anxious and scared. Some people experiencing this hallucinates. They see, hear, or feel things or other beings that aren’t in their surroundings.
Isolated sleep paralysis is something that need not to be neglected, especially because recurrence of this does not disturb your sleep, so you might not know that it happening again.