- Difficulty falling asleep
- Difficulty staying asleep
- Waking up frequently during the night with difficulty returning to sleep
- Waking up too early in the morning
- Having least refreshing sleep
In any of these cases the person feels tired the next day, or feels as if he or she did not have enough sleep. Poor sleep for any length of time can lead to mood disturbances, lack of motivation, decreased attention span, trouble with concentration, low levels of energy, and increased fatigue.
People who suffer from insomnia are called insomniacs. Insomniacs can be of any age, sex, social class or nationality.
Insomnia varies from restless or disturbed sleep to a reduction in the usual time spent in sleeping and, in the extreme, may involve complete sleeplessness.
Insomnia is neither a disease nor an illness. It is a symptom of many different kinds of illnesses or conditions such as sleep disorders, acute stress, jet lag, heart disease etc.
About one-third of the average person’s life is spent in sleeping. Healthy sleep is vital to the human body and important for the optimal functioning of the brain and other organs.