Lung cancer is a chronic disease which affects millions of people globally every year. It is known to be the most common type of cancer. It leads the cancers causing maximum deaths annually. The basic cause of lung cancer is the tobacco chewing and smoking. It is more common in males after 40 years of age and those who have been smoking heavily from more than 5 years. Cancer is the final outcome of altering the natural respiratory pathway. This can also occur as a result of genetic susceptibility and after consistent respiratory ailments.
Nicotine acts an irritant to the air passages. Lung cancer is not diagnosed until it reaches an advanced stage and starts showing some clinical symptoms. It is a silent killer as there are no symptoms except breathlessness and difficult breathing in the early stages. Later in the advanced stages the symptoms are blood from the lungs into the cough which is also known as hemoptysis. There is constant cough and gagging. Blood may come out tin the blood being expectorated with every paroxysm of cough. Fever may be present all the time, swelling of face and throat producing restlessness and wheezing sounds are other features of the disease.