sleeplessness

Example:After her recent divorce, Sarah suffers from an extended period of insomnia.

Definition:A sleep disorder characterized by difficulty falling or staying asleep, or of sleeping poorly.

Example:His hypersomnia might be a sign of an underlying health condition.

Definition:The condition of excessive sleepiness or excessive sleeping, usually occurring even after adequate time for sleep has been had.

Example:Sleep disorders include insomnia, hypersomnia, sleep apnea, and more.

Definition:A condition that affects the duration, quality, or timing of sleep.

Example:She had a fitful sleep, waking up several times during the night.

Definition:Sleep that is interrupted often and is not restful or refreshing.