Nightmare Before Christmas Music Box Limited Edition Foremost Notable Preeminent. Learn strategies for overcoming fears and achieving better sleep. Uncover the meanings behind your nightmares with our guide to common bad dreams.

A nightmare, also known as a bad dream, [1] is an unpleasant dream that can cause a strong emotional response from the mind, typically fear but also. Nightmares can affect anyone, and when frequent, can harm sleep and daily life. A nightmare is a disturbing dream that provokes a strong negative emotional reaction.