The brain is a complex part of our bodies, and we don’t actually know all of the ways in which nicotine withdrawal causes sleep disturbances. What we can tell you is that it affects everyone differently – the greater your addiction to nicotine, the worse the sleep disturbance you may experience. You might also find that your symptoms change during the course of your withdrawal.

Smoking is very bad for you and your health and can increase your risk of serious or often fatal diseases. Cigarette smoking harms nearly every organ of the body, causes many diseases, and reduces the health of smokers in general. 

Smoking can lead to a variety of ongoing complications in the body, as well as long-term effects on your body systems. While smoking can increase your risk of a variety of problems over several years, some of the bodily effects are immediate.

If knowing what smoking does to the inside of your body isn't enough to motivate you to quit, consider the damage it does to your looks. Long-term smoking takes a major toll on the appearance of your hair, teeth, skin, and more.