hypersomnia - an inability to stay awake

insomnia - an inability to sleep; chronic sleeplessness

pavor nocturnus, sleep terror disorder - a disorder of sleep characterized by a dream of terrifying dimensions far worse than a typical nightmare; they occur during NREM sleep

disorder, upset - condition in which there is a disturbance of normal functioning; "the doctor prescribed some medicine for the disorder"; "everyone gets stomach upsets from time to time"

sleep apnea - apnea that occurs during sleep