Sleep paralysis is a feeling of being conscious, but unable to move. It occurs when a person passes between stages of wakefulness and sleep. – WebMD
Undoubtedly, there is nothing stranger that to wake up and not being able to move any part of the body, even though you are completely aware of everything around you. This condition is known as sleep paralysis, and is an extremely frightening phenomenon.
In this case, the individual is entirely conscious, but his/her body is absolutely paralysed. Since the person cannot control the body, he becomes really terrified and disturbed.
However, you should know that this phenomenon is common and does not lead to any physical damage to the body. Namely, it occurs during one of two stages -“hypnagogic” and “hypnopompic.”
The first one happens before falling asleep, while hypnopompic sleep paralysis occurs as soon as the person wakes from REM(rapid eye movement) sleep.