Sleep difficulties may be transient, occurring only occasionally or during periods of unusual stress. In chronic insomnia, however, the symptoms are ongoing and result in anxiety that sleep will never come - making it even more elusive.
Lack of restful sleep greatly affect the functions of the brain creating poor memory, lack of emotional control, and problem-solving difficulties. Additionally, insomniacs may have trouble focusing and learning. They may find themselves angry or tearful out of proportion to the situation. Tasks or challenges that are easily undertaken when a person is well rested become monumental when attempted in a state of exhaustion. Driving and job safety may be compromised because reaction times are delayed.