In-depth

Insomnia

Sleepless nights? Insomnia includes difficulty going to sleep, staying asleep or going back to sleep after you awaken. Insomnia may be temporary or chronic.

Narcolepsy

Nightmare disorder

Sleep apnea

Sleep terrors (night terrors)

Sleepwalking

Sleepwalking is usually harmless. Learn what can happen during a sleepwalking episode — and what to do about it.

Snoring

Dec. 04, 2014