Ability to get insufficient amount of sleep is called insomnia. The conditions can be in falling asleep, remaining asleep, or both. It is a universal disorder that affects millions of people around the globe. It can be caused by many different conditions, diseases, and circumstances
Insomnia is a very common condition that perhaps affects most people at one time or another. However, its recurrence is more frequent in specific groups of people e.g. it is more common in women and elderly. People who are divorced, widowed, or separated having more chances of getting this disease than those who are single or married.
Short-term, or acute, insomnia usually vanished within a few days. Long-term, or chronic, insomnia lasts for several weeks. People who are running short of sleep for extended periods of time are at high risk to themselves and to others as well.