A reader recently asked The New York Times if occasionally smoking a cigarette – particularly when others are smoking – is truly harmful to their health.
Around 10% of people in the United States identify as “social smokers,” meaning they only smoke in social situations, according to estimates. This practice raises concerns about the potential health risks, even for those who don’t consider themselves regular smokers.
Whereas limited research focuses specifically on occasional smoking, experts emphasize that cigarettes remain the leading cause of preventable disease and death in the U.S., and even social smoking carries risks – most notably, the potential for nicotine addiction. Understanding these risks is crucial for public health, as even infrequent smoking can have lasting consequences.
HOW SMOKING CIGARETTES AFFECTS YOUR HEALTH
Smoking damages the body in two distinct ways, explains cardiologist and epidemiologist Michael Blaha. Cigarettes can cause immediate harm to the lungs and heart, and increase the likelihood of developing chronic diseases in the future.
“It’s astonishing how toxic a cigarette can be,” says Blaha, even if you smoke just one a day.
Each puff delivers nicotine – along with a variety of additives designed to enhance flavor and sensation – and over 7,000 chemicals when burned. These chemicals can increase the risk of various health conditions, with around 70 specifically linked to cancer.
Smoking immediately irritates the lungs, causing sore throats and coughing. It also increases susceptibility to respiratory infections, says Anil Vachani, a pulmonologist and co-director of the Lung Cancer Screening Program at NYU Langone Health.
Over time, cigarettes permanently damage the air sacs in the lungs, making individuals more vulnerable to conditions like chronic obstructive pulmonary disease and emphysema.
Even occasional smoking elevates blood pressure, constricts blood vessels, and strains the heart while smoking, according to Blaha, who has conducted numerous studies on the effects of tobacco. Regular smokers are more likely to develop heart disease and have twice the risk of stroke caused by blood clots compared to non-smokers.
The risk of cancer also increases, Vachani notes. Smoking is the primary risk factor for lung cancer and significantly increases the chances of developing cancers of the head and neck. Emerging research also suggests smoking may increase the likelihood of dying from diseases not typically associated with cigarettes, including other types of cancer, infections, and kidney failure.
DOES SMOKING FEWER CIGARETTES Aid?
Blaha and his research team published a large study in November to assess whether reducing cigarette consumption could lower the risk of developing these conditions.
Researchers found that simply reducing the number of cigarettes – for example, cutting back from a full pack to half a pack per day – did not significantly decrease the likelihood of negative health outcomes.
Still, when someone quits smoking, “your risk decreases immediately,” says Blaha, although it takes time – years, or even decades – to return to the level of a non-smoker.
Even for sporadic smokers, experts say there’s no guarantee of being risk-free. While one cigarette a year likely won’t lead to a heart attack or stroke, each one increases the chances of forming a habit.
“The risk of becoming addicted is lower, but it’s not zero,” says Nancy Rigotti, director of the Tobacco Research and Treatment Center at Massachusetts General Hospital. “I suppose you’re playing with fire.”
Smoking a cigarette at a party is even riskier for those who previously smoked regularly. “smoking two cigarettes after having quit for ten years probably isn’t going to change your health risks,” says Vachani. “But for anyone who was a regular smoker, it’s almost impossible to smoke just two cigarettes and stop again.”
ARE THERE WAYS TO AVOID TEMPTATION?
Vachani acknowledges the temptation to smoke during the holiday season, a time of celebration where alcohol consumption can enhance the pleasure smokers derive from cigarettes. “I try to tell people: stay focused on the goal, which is your long-term health,” he says.
If you anticipate being in a smoking environment and want to avoid cigarettes, MacKenzie Peltier, an assistant professor in the Yale Department of Psychiatry, recommends enlisting the support of a friend. Having alternatives on hand, such as gum, is also a good strategy, she says.
Asking yourself why you want that cigarette can also be helpful. “Is it because you want to fit in and socialize? Is it because you’re feeling a little anxious around a larger group and want to relax?” says Peltier. “When you think about why you might want to smoke, that can give you a lot of guidance about how to prevent yourself from doing it.”
