Lungs Caner Causes

Cigarette smoking is basically the most important and threatening cause of a lung cancer. Research has established this relationship. Smoke of cigarette contains 4,000 chemicals or more than that which have been identified as a major cause of cancer. A smoker who smokes one pack or more a day is at the extreme risk of cancer development, which is 20-25 times more than a person who never smoked. Once a smoker quits smoking, the rate of cancer development in him is gradually decreased. After 15 years of quitting, this risk decreases to a level of a person who never used to smoke. Pipe and cigar smoking also increases the risk of a lung cancer, but it is not as much as cigarette smoking.

Use of tobacco is the major cause of 90% of lung cancers. The lung cancer risk development is related to some factors, which are: number of cigarettes which is smoked, person’s age at which he started smoking, time for how long did he smoked or for how long he smoked before he quit smoking.

Other causes of a lung cancer may include: Secondhand smoke or a passive smoking is a major secondary cause, Air pollution which may be due to vehicles or factories;experts have a believe that a long term exposure to such polluted air increases the risk of developing a lung cancer. Lung cancer risk increases 9 times by asbestos exposure, while a combination of asbestos and a cigarette smoking increases the lung cancer development risk by 50 times.

What are the different signs and symptoms of a lung cancer?

A lung cancer symptom is always varied and depends upon the widespread nature of tumor. Warning signs of a lung cancer are not always easy to recognize for identification. A person having a lung cancer may have the following types of symptoms.

First of all, a person can have no symptoms to be identify.But, many people develop symptoms, which are, in fact, the results of primary tumor, effects of tumors, which are metastatic by nature and develops in other parts of a body, hormonal disturbance or other symptoms that are caused by cancer.

Symptoms of a primary lung cancer basically include chest pain, shortness of breath and cough with blood. A cough in new smoker or old sessions in him should be evaluated by a physician. Cough with blood is called hemoptysis occurs in a large number of people having lung cancer.

One fourth people having lung cancer suffers from a chest pain. The pain is basically persistent, aching and dull and can also involve in it other structures that surround the lung. Breathe shortening results from any blockage in lungs that prevents normal free passage of air through the lungs. Hoarseness and wheezing usually signal the inflammation in the lungs that may go with cancer. Repeated infections related to the respiratory tract like pneumonia or bronchitis are also the signs of a lung cancer.

Metastasis to bones is also common with a small cell cancer. Lung cancer that has been metastasized to bones may cause pain in bones, mostly in the backbone, the ribs and the thigh bone. Lung cancer which spreads to brain may cause difficulties in person’s vision and seizures or weakness on the other side of a body.