Smoking is associated with structural changes in the airways and pulmonary parenchyma, including upper airway mucosal gland hypertrophy and hyperplasia. Smoking decreases the levels of oxygen reaching tissues because it constricts and damages blood vessels, giving rise to different health problems.

Smokers are more likely to get cancer; cancer of the lungs, throat, gullet and mouth is caused by Carcinogen that is present in tobacco smoke. It is approximated that 90% of lung cancer cases are associated with smoking. Smoking also affects others besides the smoker. When other people inhale the smoke of that tobacco, they will also suffer from the lungs diseases and other heart disease.

When you inhale, a cigarette burns at 700°C at the tip and around 60°C in the core. This heat breaks down the tobacco to produce various toxins. Most people know that smoking can cause lung cancer, but it can also cause many other cancers and illnesses. When Cigarette smoke reaches deep into the lungs and causes permanent damage. This will cause emphysema. Smoking raises blood pressure, which can cause hypertension (high blood pressure) – a risk factor for heart attacks and stroke. The blood vessels in the eye are sensitive and can be easily damaged by smoke, causing a bloodshot appearance and itchiness