Advertisement

Does exposure to secondhand smoke cause cancer?

Exposure to secondhand smoke causes cancer because secondhand smoke contains compounds that can cause cancer. So, if someone breathes enough secondhand smoke, they can develop cancer as well.

Yes. The U.S. Environmental Protection Agency (EPA), the U.S. National Toxicology Program (NTP), the U.S. Surgeon General and the International Agency for Research on Cancer (IARC) have classified secondhand smoke as a known human carcinogen (cancer-causing agent). Inhaling secondhand smoke causes lung cancer in nonsmoking adults. Approximately 3,000 lung cancer deaths occur each year among adult nonsmokers in the United States as a result of exposure to secondhand smoke. The Surgeon General estimates that living with a smoker increases a nonsmoker's chances of developing lung cancer by 20 to 30 percent.

Some research suggests that secondhand smoke may increase the risk of breast cancer, nasal sinus cavity cancer, and nasopharyngeal cancer in adults, and leukemia, lymphoma and brain tumors in children. Additional research is needed to learn whether a link exists between secondhand smoke exposure and these cancers.

This answer is based on source information from the National Cancer Institute.

Continue Learning about Quit Smoking

Hawaii Health Alert: Is Vaping Really Better Than Smoking?
Hawaii Health Alert: Is Vaping Really Better Than Smoking?
Millions of Americans use e-cigarettes regularly, and the number of vapers in the United States is on the rise, particularly among young people. Vapin...
Read More
How does nicotine get in, where does it go, and how long does it stay?
Dr. Vincent T DeVita JrDr. Vincent T DeVita Jr
When you inhale smoke, nicotine is carried deep into your lungs. There it is quickly absorbed into t...
More Answers
How to Quit Smoking Once and for All
How to Quit Smoking Once and for AllHow to Quit Smoking Once and for AllHow to Quit Smoking Once and for AllHow to Quit Smoking Once and for All
Say farewell to your cigarettes by sticking to this step-by-step plan.
Start Slideshow
How Eye Health Is Influenced by Overall Health
How Eye Health Is Influenced by Overall Health

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.