It is also the smoke that comes from someone’s mouth after they have blown it out. Secondhand smoke is full of chemicals so breathing in the smoke is very bad for your health.
Secondhand smoke can make you cough or wheeze, and if you have asthma it can make breathing very difficult. It can also give you a headache or make you feel sick.
Protect yourself from secondhand smoke
There is no law to stop people smoking in their own home, but since October 1st 2015 it has been against the law to smoke in a car if there are people under 18 years old travelling in it.
Some adults think that if they smoke out of a window in the house or car, it protects other people from their secondhand smoke. They are wrong. Some of the smoke always comes back in.
What can you do?
Talk to the adults you know and tell them what you have learned about secondhand smoke. Ask them to look at the NHS webpage about secondhand smoke and make the promise to always keep the home and car smoke free to protect their family’s health.