The main symptom of insomnia is trouble falling or staying asleep, which leads to lack of sleep. If you have insomnia, you may:
The lack of sleep can cause other symptoms. You may wake up feeling tired or not well-rested, and you may feel tired during the day. You also may have trouble focusing on tasks. Insomnia can cause you to feel anxious, depressed, or irritable.
Insomnia also can affect your daily activities and cause serious problems. For example, you may feel drowsy while driving. Driver sleepiness (not related to alcohol) is responsible for almost 20 percent of all serious car crash injuries. Research also shows that insomnia raises older women’s risk of falling.
If insomnia is affecting your daily activities, talk with your doctor. Treatment may help you avoid symptoms and problems related to the disorder. Also, poor sleep may be a sign of other health problems. Finding and treating those problems could improve your overall health and sleep.
The NHLBI updates Health Topics articles on a biennial cycle based on a thorough review of research findings and new literature. The articles also are updated as needed if important new research is published. The date on each Health Topics article reflects when the content was originally posted or last revised.