How Dangerous Is Thirdhand Smoke, Really?

How dangerous is thirdhand smoke, really? Smoking is harmful to health, and many people claim to love their children while still smoking daily. Some may argue that they try to avoid smoking around their kids. In reality, while secondhand smoke can sometimes be avoided, the dangers of thirdhand smoke are much harder to escape.
 
Since last year, a 3-year-old child in Yantai has been suffering from persistent coughing and difficulty breathing. After a long search for the cause, the child was diagnosed with asthma. Recently, the cause was identified! The problem lay with the grandfather, who is a heavy smoker. Although he doesn’t smoke in front of the child, he often holds the child after smoking!

In Shenyang, there was a family where the father smoked heavily, and the mother and daughter were forced to live in an environment filled with secondhand and thirdhand smoke. Subsequently, all three family members were diagnosed with lung cancer!

What exactly is thirdhand smoke? Many parents may not have heard of it.

Simply put, it is the smell of smoke. If someone smokes in a room, we can smell the smoke as soon as we enter, and various items in the room will also carry the smell of smoke. More specifically, it refers to the residues left on the smoker's hair, skin, and clothing, as well as on surfaces in the surrounding environment, such as walls, carpets, and furniture. These invisible but toxic gases and particulate matter are remnants of smoke. These harmful substances include 250 different chemicals, such as heavy metals, carcinogens, and radioactive materials.

Moreover, they can linger for a long time, from days to weeks, or even months. This is why when we enter a room (like an internet café, restaurant, KTV room, or taxi), even if no one is smoking at that moment, we still come out smelling like smoke.

So even if no one in the house smokes or smokes in front of the child, the child can still be exposed to an environment contaminated by thirdhand smoke. As children crawl and touch everything, they may come into contact with harmful substances that have settled on surfaces.

So, how dangerous is thirdhand smoke?

Do not think that secondhand smoke is less harmful than direct smoking. In fact, the harmful substances inhaled by smokers only account for one-tenth of the total substances; the rest are released into the air and adhere to clothing, furniture, and other solids. Moreover, compared to secondhand smoke, which can be dispersed by ventilation, the residual particles of thirdhand smoke are quite "stubborn," not easily blown away by the wind or washed away by water.

In fact, as early as 2009, the Lawrence Berkeley National Laboratory published a paper on "thirdhand smoke." One alarming statement in the paper is, "Experiments have confirmed that substances remaining in a room where someone has smoked can transform into carcinogens."

According to a 2017 experiment by scientist Antoine Sniders on the health hazards of thirdhand smoke, exposure to thirdhand smoke can harm the immune system of mice and lead to weight loss in young mice. Therefore, researchers believe these hazards also apply to humans, especially infants and young children.

Due to the physiological characteristics of infants and young children, their body weight is lower than that of adults, and they breathe more air than adults, thus inhaling more pollutants. The same level of exposure to toxic substances can cause greater harm to infants and young children, making them more susceptible to bronchitis, pneumonia, and other lower respiratory infections, prone to asthma, inducing anorexia, middle ear diseases, and cognitive decline. Children who are long-term exposed to such environments may even have an increased risk of cancer in adulthood.

However, it is frustrating that there is currently no thorough or effective way to eliminate thirdhand smoke. The best solution is, of course, to quit smoking and create a 100% smoke-free environment. However, this is very difficult; getting family members to quit smoking is not easy, let alone stopping those who lack public morals from smoking shamelessly in public places.

But the harm of thirdhand smoke to babies is indeed present and very serious, so it is necessary for everyone to master some tips to reduce the retention of thirdhand smoke, which can help to some extent:

1. If family members cannot quit smoking, advise them to smoke outdoors and to shower, brush their teeth, and change clothes immediately after returning home before approaching the baby.

2. If someone smokes in the house or car, promptly change and wash contaminated clothing, furniture, carpets, sofa covers, etc., to minimize the harm of residual substances to the baby.

3. When taking the baby out, try to choose "no smoking" restaurants, indoor leisure venues, etc.

Finally, I urge that relevant regulations be enacted in various regions of our country to ban smoking in all indoor places and to enforce these regulations strictly. I also hope that smokers can quit their addiction as soon as possible; if not, please smoke with consideration!