Smoking refers to inhaling of tobacco smoke by various means such as cigarettes, cigars and pipes. People have been smoking tobacco indifferent forms since many centuries, for relaxation and pleasure. However with regular smoking a person gets addicted to a substance called nicotine contained in the tobacco and then the major objective of smoking becomes satisfying this craving for nicotine.
This craving for nicotine and compulsion to smoke because of it is, in itself, a significant problem of smoking. However since 1900 scientists have found increasing evidence of many harmful effect of smoking on health.
Smoking has now been associated with diseases like lung diseases, cancer of mouth, lungs and other organs,and heart problems.
Tobacco smoke contains thousands of different chemicals as particulate matters, which are very harmful for the health of the smoker. Some of these harmful chemicals include hydrogen cyanide, nitrogen oxide and carbon monoxide. Continued high level of carbon monoxide associated with smoking is known to cause heart problems.
The particulate matters in the smoke gets deposited in mucous lining of lungs and the air passages leading to the lungs. This deposits get accumulated over a period and scar lung and the airways.
Smoking by women during pregnancy can harm the unborn child leading to low weight at birth and defective development of baby.
In addition to these problems classified as diseases, smoking cause general loss of stamina and causes breathlessness in smokers.
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