World Cancer Day is observed every year on four February. All countries around the world celebrate World Cancer Day with the aim of awareness of cancer and the prevention of this disease. Lung cancer is the leading cause of most deaths in the world. Lung cancer is one of the most common cancers in India, and many times its symptoms are identified in the last stage. There are several causes of lung cancer among which cigarette and tobacco consumption are the most common. Cigarette smoke contains more than four thousand chemicals, due to which the risk of lung cancer increases greatly. Researches have revealed that if a person smokes a pack of cigarettes a day, the risk of lung cancer increases by 20 to 25 percent. Let’s know the symptoms of lung cancer

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