Breast cancer is the most common type of cancer, and one of the leading causes of cancer-related deaths worldwide. Smoking is linked to a higher risk of breast cancer in some people.
The exact cause of breast cancer is unknown, but some risk factors make it more likely a person could develop breast cancer.
A person cannot change certain breast cancer risk factors such as genetics or age, but they can change others, such as smoking.
Continue reading to learn about the link between cigarette smoke exposure and breast cancer, how smoking affects breast cancer treatment, and more.
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Smoking can increase the risk of cancer, as certain chemicals in tobacco products may lead to uncontrolled cell growth within a person’s body. Although smoking is not considered a direct cause of breast cancer, smoking is linked to a higher risk in some people.
A 2017 study found that smoking was associated with a modest but significantly increased risk of breast cancer in certain women, including:
- women who started smoking in adolescence, or by the age of 17
- women who started smoking before or at the time of their first period
- women who started smoking 1 to 4 years after their first period
- women with a family history of breast cancer who smoked at any time in their lives
- women of childbearing age who are BRCA2 mutation carriers
- women who smoked for at least 10 years
- women who had stopped smoking for less than 20 years
- women who smoked more than 5 years before their first full-term pregnancy
- women who smoked more than five cigarettes per day
According to the American Cancer Society’s 2021 estimates for breast cancer in women in the United States, there will be 281,550 new diagnosed cases with 43,600 deaths from the disease.
In 2019, the Center for Disease Control and Prevention (CDC) published that approximately
The WHO states that
Additional statistics from a 2017 study published in Breast Cancer Research include:
- Women who smoked at some point in their lives were 14% more likely to develop breast cancer than those who had never smoked.
- Women who started smoking before age 17 had a 24% increased risk, while those who started smoking between ages 17 and 19 had a 15% increased rate of breast cancer.
- Smoking for over 10 years increased the risk of developing breast cancer by 21%, while those who smoked for over 30 years had a slightly higher risk (22%).
- Of the women who had quit smoking, there was still a 28% increased risk of developing breast cancer for those who had quit for less than 10 years.
- For women with a family history of breast cancer, their risk for breast cancer was highest if they started smoking by age 20 (56%).
Treatments for breast cancer include:
Smoking can increase complications of breast cancer treatment.
According to a 2020 review, smoking during radiation treatment can cause complications, including:
- a poorer response to treatment
- poorer 2-year survival rates
- recurrence of cancer
- a possible increase in cardiovascular events such as heart attack, stroke, or congestive heart failure
The study mentions that people who smoke still experienced a higher risk of major complications, such as difficulty healing after surgery and after breast reconstruction, even if they did not receive radiation therapy.
Because cannabis smoke contains similar ingredients to tobacco, smoking cannabis may be a risk factor for the development of lung cancer.
The authors of the review do note that because there was not enough evidence linking smoking cannabis to other cancers, larger-scale studies are needed.
Passive smoking, also known as secondhand smoke, is the combination of smoke from the burning end of a cigarette and the smoke that people exhale.
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Doctors have long suspected a link between smoking and breast cancer risk, but according to the advocacy group breastcancer.org, research results are mixed. More research is needed to understand the potential link between secondhand smoke and breast cancer risk.
Smoking is harmful, and there is no safe level of exposure to tobacco. Quitting smoking lowers a person’s risk for developing many smoking-related diseases, such as breast cancer.
Most people quit smoking using a combination of medicine and behavioral changes.
Some tips for quitting smoking include:
- Discuss smoking cessation medications with a doctor.
- Set a quit smoking date.
- Start an exercise or walking program.
- Try acupuncture.
- Practice mindful meditation.
- Avoid smoking triggers.
- Try a quit smoking app.
- Find a buddy who also wants to quit smoking.
- Use a telephone quit-line such as 800-QUIT-NOW (800-448-7848).
- Contact smoking cessation help programs, such as those offered by the American Cancer Society and the American Lung Association.
Research shows that smoking is associated with an
Smoking is a significant health problem and one of the few potentially
People who do not smoke should avoid starting. For people who do smoke, many programs are available to help with quitting.