Insomnia is defined as a sleep disorder. It is a condition of inadequate or poor-quality sleep due to a number of factors, such as difficulty falling asleep, waking up frequently during the night with difficulty returning to sleep. Many sources also add the presence of associated daytime impairments, such as fatigue, irritability, decreased memory, concentration, and pervasive malaise affecting many aspects of daytime functioning. Although it is generally believed that 10% to 15% of the adult population suffers from the condition of insomnia. People over the age of 65 are affected more often than younger people and it has been shown that females are more often affected than males. Insomnia can be triggered by your behaviors and sleep patterns.