It affects people of all ages and typically lasts for a night or two. In extreme cases, insomnia can last for weeks, months and even years. Most cases of brief insomnia are triggered by the anticipation of an upcoming event. Changes of schedule and brief illness my also interrupt sleep temporarily. Insomnia that lasts two to three weeks often develops during periods of severe stress at home or work.
Sleep usually returns to normal once the source of the stress is relieved.
Chronic insomnia is complex disorder with many possible causes. These include psychological depression, anxiety, stress and poor sleep habits. Get regular exercise. Go to bed and awaken at the same time every day. If you work night shifts, maintain a consistent schedule, even on your nights off.