Some people can’t sleep because they are trying to stop smoking. When your body craves nicotine due to a dependency, it may cause you to wake up periodically during the night with an increased heart rate, especially if you are trying to quit. If you decide to get up and have a cigarette you may find it hard to go back to sleep because nicotine is considered a stimulant even though many people feel the need to smoke as a way to calm themselves down and relax. The fact is smoking stimulates the mind and body that can initiate sleep problems and if you can’t sleep over a period of time it may result in sleep deprivation, in which you will find it more difficult to function normally during the day and eventually it may cause serious health issues; like heart disease and obesity. Read more »