burning a match stick in black background

How Long Does Secondhand Smoke Stay In Your System – high risk of inhaling smoke?

smoke in black background

In public places such as cars, home, schools, workplaces, hospitals, or public transportation, non- smokers still get the high risk of inhaling smoke from the smokers in the environment around. Therefore, many no-smokers worried that how the smoke they absorb from smokers will affect their health. Today the question will be discussed in this article below: “How long does secondhand smoke stay in your system?”.

What Do You Know About Second Hand Smoke?

Secondhand smoke is called environmental tobacco smoke or passive smoke. There are two kinds of burning tobacco smoke mixed to produce passive smoke, including:

Smoke comes directly from the smokers

Smoke from a lighted cigarette end or other drugs like cigar or pipe. This kind of smoke is said to be more harmful to the health than smoke owing to its higher concentration of toxins- leading cancer. Also, the particles in this stream smoke are also easier to penetrate into the lung, and the body’s cells were owing to its smaller size.

According to many studies, there were more than 7000 chemicals found in environment smoke. These chemicals are noxious for the body, and approximately 70 of these toxic chemicals are blamed for cancers.

Secondhand smoke exposure is also known as a serious health hazard which is blamed for more than 400 deaths in infants and 41,000 deaths in adults each year. Secondhand smoke can lead to or make worse a wide range of health problems in both children and adults, such as lung cancer, asthma, or respiratory infections.  In many studies, children exposed to secondhand smoke can get the high risk of respiratory symptoms, acute respiratory infections, sudden death syndrome, middle ear disease, slowed lung growth, and more severe asthma.

What Are The Health Risks of Secondhand Smoke?

As mentioned above, secondhand smoke (SHS) contains harmful chemicals which smokers inhale. Below is the list of the health risks caused by secondhand smoke.

Secondhand smoke can contribute to cancer. 70 of 7,000 chemicals found in the cigarette can cause cancer. In many studies, secondhand smoke can also be linked to cancers in adults including:

  • Larynx (voice box)
  • Pharynx (throat)
  • Breast
  • Nasal sinuses
  • Brain
  • Rectum
  • Bladder
  • Stomach

Secondhand smoke is also linked to cancers in children including:

  • Leukemia
  • Lymphoma
  • Brain tumors
  • Liver cancer

Secondhand smoke also causes other diseases. It is harmful in various ways. For example, it impacts our heart and blood vessels, which increases the risk of stroke and heart attack in non-smokers. Many studies claimed that there is a correlation between emotional and mental changes and secondhand smoke such as depression.

Moreover, it can affect children’s health. Most of the children are exposed to SHS from adults (their parents or others) at home. They may:

  • Get sick and weak more often
  • Easily get more lung infections (such as bronchitis or pneumonia)
  • Frequently have shortness of breath
  • Easily get a cough, wheeze
  • Easily get more ear infections
  • Easily get asthma or make asthma worse

How Long Does Second Hand Smoke Stay In Your System

There is no doubt that smoking is harmful to the health. We are wondering if secondhand smoke which is absorbed by smokers can affect our body. If yes, how long does it stay in their body?

In fact, there is no specific study regarding how long does secondhand stay in your system. Many studies showed that how long secondhand smoke stays depends on the amount of smoke that enter into your body. Many researchers also confirmed that the longer time you exposed to secondhand smoke, the wider its concentration accumulates in the body, leading to the lower ability of your body in removing nicotine from secondhand smoke.

Not different from smoking directly from the cigarette, secondhand smoke has an amount of nicotine that is hazardous to the health. As nicotine from secondhand smoke enters into the body, it will metabolize into cotinine and primarily accumulates in body fluids including saliva, blood, and urine. The removal of nicotine from each zone is not the same and also depends on many factors.


When nicotine amount reaches a certain level, it can be found in the saliva. Depending on the concentration of nicotine in your body, after your last cigarette, the stay of nicotine in the saliva often varies from 10 hours to 4 days.


With a certain amount of nicotine from secondhand smoke penetrating into the body, it is detected in the blood and exists up to 10 days for cotinine and from 1 to 3 days for nicotine.


If you live in a smoking environment or are exposed to smokers frequently, secondhand smoke can enter into the body and exist between one to three weeks.

What Can Be Done About Secondhand Smoke?

Although there is detailed information on a smoking ban in every country, the bad habit seems not to be restricted effectively. The solution comes from each individual. All of us do not have to wait for actions from the government. The solution is that before deciding to smoke, please try to find a place to leave home and your children in a smoke-free. More important, involuntary smoke can save many people from thousands of diseases each year. It can be the safest method to help you protect your children, family members from secondhand smoke.

Please follow and like us:

Leave a Reply

Your email address will not be published. Required fields are marked *