Insomnia is a common condition in which you have trouble falling asleep, staying asleep, or returning to sleep after you awaken. It can be a chronic (long-term) problem if it lasts more than 3 nights per week for more than a month. Or it may be an acute (short-term) problem if it lasts less than that. Either way, it can be very disruptive to your daily routine. Plus it can lead you to have negative consequences of sleep-deprivation over time.
Most people (8 out of 10) have insomnia that is caused by a medical condition, medicines, or other substances. Below are some of the heart-related causes of insomnia. Your doctor may be able to help you sleep better if you bring your sleep problems to his or her attention.