Lung cancer (patient information)

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What are the symptoms of Lung cancer?

Early lung cancer often does not cause symptoms. But as the cancer grows, common symptoms may include:

• a cough that gets worse or does not go away
• breathing trouble, such as shortness of breath
• constant chest pain
• coughing up blood
• a hoarse voice
• frequent lung infections, such as pneumonia
• feeling very tired all the time
• weight loss with no known cause

Most often these symptoms are not due to cancer. Other health problems can cause some of these symptoms. Anyone with such symptoms should see a doctor to be diagnosed and treated as early as possible.

Who is at risk for Lung cancer?

Studies have found the following risk factors for lung cancer:

• Tobacco smoke: Tobacco smoke causes most cases of lung cancer. It's by far the most important risk factor for lung cancer. Harmful substances in smoke damage lung cells. That's why smoking cigarettes, pipes, or cigars can cause lung cancer and why secondhand smoke can cause lung cancer in nonsmokers. The more a person is exposed to smoke, the greater the risk of lung cancer. For more information, see the NCI fact sheets Quitting Smoking and Secondhand Smoke.

• Radon: Radon is a radioactive gas that you cannot see, smell, or taste. It forms in soil and rocks. People who work in mines may be exposed to radon. In some parts of the country, radon is found in houses. Radon damages lung cells, and people exposed to radon are at increased risk of lung cancer. The risk of lung cancer from radon is even higher for smokers. For more information, see the NCI fact sheet Radon and Cancer.

• Asbestos and other substances: People who have certain jobs (such as those who work in the construction and chemical industries) have an increased risk of lung cancer. Exposure to asbestos, arsenic, chromium, nickel, soot, tar, and other substances can cause lung cancer. The risk is highest for those with years of exposure. The risk of lung cancer from these substances is even higher for smokers.

• Air pollution: Air pollution may slightly increase the risk of lung cancer. The risk from air pollution is higher for smokers.

• Family history of lung cancer: People with a father, mother, brother, or sister who had lung cancer may be at slightly increased risk of the disease, even if they don't smoke.

• Personal history of lung cancer: People who have had lung cancer are at increased risk of developing a second lung tumor.

• Age over 65: Most people are older than 65 years when diagnosed with lung cancer.

Where to find medical care for yourdisease

Directions to Hospitals Treating Lung cancer