How are sleep quality and quality of sleep affected by smoking? Smoking can affect a person's health by increasing the chance of having an irregular sleep or insomnia, which can lead to headaches, loss of appetite, and stress. For example, smoking can cause insomnia. Also, smoking can cause an increase in the level of CO2 in the air, which could make you sleep less, even for several days, which might even make you sick, but this is a risk you have to be aware of. How to reduce or quit smoking? You may smoke a pack of cigarettes a day if you can manage it. It's not easy to quit. In fact, smoking can be very hard to quit and it's still a problem in many cases. You may have to take a break. For a more detailed review of smoking and sleep, see the article "Sleeping Well: What's Wrong with Smoking and Why You Should Quit?" If you are worried about being sick during the day, or have any concerns about the possible adverse effects of tobacco, then I suggest you try using a sleep mask to mask your cigarette smoke. This could help reduce the symptoms of the nicotine withdrawal symptoms, and also could help prevent the morning wake-up call.