The lack of sleep is termed as insomnia and is also known as sleeplessness. Sleep is a periodic state of relax for the body, which is significant for its competent functioning. It gives relief from nervousness and worries. The amount of sleep varies from individual to individual. Normally 7-8 hours of sleep each night is adequate and normal.

Insomnia deprives the person with mental rest and interferes with the daily activities. It is the most ordinary difficulty among the people of upper classes in urban areas. It is also ordinary among the elderly people as the sleep requirements decreases with aging.

Causes of Insomnia