Before we begin: Secondhand smoke is smoke that comes from the burning end of a cigarette, cigar, or pipe, and the smoke breathed out by the smoker affecting others.
This tutorial walks you through everything you need to know about secondhand smoke. We explain it in plain language, step by step, so whether you are a student, a patient, or simply curious, you will come away with a solid understanding.
We cover what it is, why it matters, how it is diagnosed, and what you can do about it. Key facts are called out along the way.
Secondhand smoke is a mixture of the smoke that comes from the burning end of a cigarette, cigar, or pipe, and the smoke breathed out by the smoker. It contains more than 7,000 chemicals. Hundreds of those chemicals are toxic and about 70 can cause cancer.
Health effects of secondhand smoke include:
Ear infections in children
More frequent and severe asthma attacks in children
Heart disease and lung cancer in adults who have never smoked
There is no safe amount of secondhand smoke. Even low levels of it can be harmful. The only way to fully protect nonsmokers from secondhand smoke is not to allow smoking indoors.
Centers for Disease Control and Prevention
Also known as: Environmental tobacco smoke, Passive smoking, Tobacco smoke pollution.
Related topics: Environmental Tobacco Smoke, Passive Smoking, Smoking, Passive.
Categories: Poisoning, Toxicology, Environmental Health.
Source: National Institutes of Health — National Cancer Institute.
Key Takeaways
Understanding secondhand smoke is an important part of taking charge of your health. Here is what to remember:
- Know the signs — Recognizing early symptoms can lead to earlier diagnosis and better outcomes.
- Talk to your provider — If you have concerns or a family history of this condition, bring it up at your next checkup.
- Stay informed — Medical knowledge evolves. Keep learning and asking questions.
- You are not alone — Many people deal with this condition. Support groups and educational resources can help.