The health risks of tobacco use, whether smoked or chewed, are extremely harmful. Tobacco products contain hazardous chemicals such as acetone, tar, nicotine, and carbon monoxide. Inhaled chemicals can harm your lungs and other organs.

Smoking can cause chronic difficulties and long-term consequences on your body’s systems. While smoking might increase your risk of developing certain health illnesses over time, such as glaucoma, cancer, and blood clotting problems, some of the physical impacts occur right away.
Learn more about the symptoms and general consequences of smoking on the body below.
Using Tobacco
Tobacco smoke is extremely damaging to your health. There is no safe way to smoke. Replacing your cigarette with a cigar, pipe, e-cigarette, or hookah will not protect you from health dangers. According to the American Lung Association, cigarettes contain over 600 chemicals.
Many of these substances also appear in cigars and hookahs. When they burn, they release over 7,000 compounds, many of which are harmful. At least 69 of them have been identified as carcinogenic or cancer-causing. In the United States, smokers have a threefold higher mortality rate than non-smokers.

In fact, the Centers for Disease Control and Prevention (CDC) report that smoking is the leading preventable cause of death in the United States. While not all of the consequences of smoking are immediate, the problems and harm can persist for years. The good news is that stopping smoking can decrease numerous risk factors for illnesses and diseases.
Cancer And Health Risks Of Tobacco Use
Smoking can be harmful to your organs and have a detrimental impact on your overall health. Smoking can cause inflammation throughout your body and impair your immune system. This may increase your susceptibility to infection.
Smoking is an environmental risk factor for rheumatoid arthritis, albeit the exact mechanism is unknown. A well-documented association exists between smoking and a variety of cancers. Smoking increases your chances of developing cancer practically anywhere in your body.
This includes the following cancer types:

- Tracheal, bronchial, and lung cancer
- Esophageal cancer
- Acute myeloid leukemia
- Cervical cancer
- Colorectal cancer
- Kidney and uterine cancer
- Laryngeal cancer
- Bladder cancer
- Liver cancer
- Oropharyngeal cancer
- Pancreatic cancer
- Stomach or gastric cancer
If you stop smoking, cancer and health risks of tobacco use drop in 10 to 20 years, depending on the kind of cancer. However, your risk will remain higher than that of those who have never smoked.
Central Nervous System
Tobacco contains nicotine, a mood-altering substance. Nicotine is habit-forming and extremely addictive. It’s one of the reasons individuals struggle to quit smoking. Nicotine enters your brain in seconds and can provide you with a temporary boost of energy. However, once the effect wears off, you may become fatigued and want more. Physical abstinence from nicotine might impede your ability to think and cause bad feelings.
Mental health risks of tobacco use may include:
- Anxiety
- Depression
- Irritability
- Headaches
- Trouble sleeping
Effects on Vision
Long-term smoking might have negative effects on your vision and optic nerve. It may cause you to acquire eye-related disorders.
The visual health risks of tobacco use can include:
- Glaucoma is a condition in which the pressure in the eye increases, putting strain on the optic nerve and causing damage and loss of sight.
- Cataracts produce cloudy eyesight.
- Age-related macular degeneration, which causes damage to a location in the center of your retina and results in loss of your central vision.
Damage to the Respiratory System from Tobacco Use
Smoking harms the airways, air sacs (alveoli) in the lungs, and cilia, which are microscopic hair-like structures that keep debris and mucus from entering the lungs.

Lung Damage
Smoking causes permanent lung damage and tissue loss. Damage to the respiratory system can also make you more susceptible to pulmonary diseases such as tuberculosis and pneumonia, increasing the risk of death from those illnesses. Smoking can lead to a chronic cough. If you have asthma, it can exacerbate your symptoms.
Risk of Lung Cancer
Smoking can harm the lungs, causing sickness or cancer. Smoking is the major cause of lung cancer, with smokers 20 times more likely than non-smokers to develop the disease.
Chronic Lung Conditions
People who smoke are at a greater risk for chronic irreversible lung diseases such as:
- Emphysema is the destruction of air sacs in the lungs.
- Chronic bronchitis is a chronic inflammation of the lining of the lungs’ breathing tubes.
- Chronic Obstructive Pulmonary Disorder (COPD) is a range of lung disorders.
- Lung cancer.
- Adult-onset asthma
Withdrawal from tobacco products can cause temporary congestion and respiratory pain as your lungs and airways repair. Increased mucus production shortly after stopping smoking may indicate that your respiratory system is recuperating.
The Health Risks Of Tobacco Use In Infants, Children, and Teens

Babies born to pregnant women who smoke may have undeveloped lungs. Children whose parents or caregivers smoke cigarettes may be more likely to develop certain indirect health risks of tobacco use than children whose caregivers do not smoke.
These can include:
- Coughing
- Idiopathic pulmonary fibrosis
- Wheezing
- Asthma attacks
- Reduced lung function
- Pneumonia
- Bronchitis
- Impaired lung growth
- Tuberculosis
Teens who smoke may develop smaller and weaker lungs than non-smokers.
Cardiovascular System
According to the Centers for Disease Control and Prevention, cardiovascular disease induced by cigarette smoking accounts for one in every four deaths in the United States.
Cardiovascular health risks of tobacco use can affect you:
- Heart
- Arteries
- Blood vessels
Nicotine causes blood arteries to constrict, reducing the flow of blood. Smoking also causes high blood pressure, weakens blood vessel walls, and increases the risk of blood clots.
These factors raise your risk for cardiovascular disease, including:
- Atherosclerosis
- Stroke
- Peripheral artery disease
- Coronary heart disease
- Abdominal aortic aneurysm
You are also at a higher risk of deteriorating heart disease if you have already had:
- A heart attack
- Heart bypass surgery
- A stent placed in a blood vessel
Sexuality And Reproductive System
Nicotine has an effect on blood flow to both males’ and women’s genital areas. Smoking may also contribute to fertility troubles and lower sex hormone levels in men and women, resulting in diminished sexual desire.
For Females
For persons who have vaginas, it can cause sexual unhappiness by reducing lubrication and the capacity to achieve orgasm. Menopause may occur earlier in smokers than in non-smokers. Smoking affects hormone production and can make it difficult for those with vaginas to conceive.
It can also increase the risk of:
- Ectopic pregnancy
- Early delivery
- Sudden infant death syndrome (SIDS)
- Low birth weight
- Stillbirth
- Cleft palate and lip in infants
For Men
Smoking can impair sexual performance in people with penises. Smoking (Tobacco use)can impair the function of blood vessels, limiting the blood flow required for an erection in those with penises. This may lead to erectile dysfunction (ED). ED can also cause fertility issues. It can also damage sperm DNA, making conception more difficult and raising the chance of miscarriage and certain birth abnormalities.
FAQs:
How does nicotine addiction develop in teens?
Nicotine can cause brain alterations in which people, particularly young people, seek more nicotine. Until roughly age 25, the brain is still developing, and learning a new action or skill strengthens the connection.
Is there a difference between smoking processed tobacco and natural tobacco?
All cigarettes, whether those labeled as “natural,” “organic,” or “additive-free,” contain hazardous ingredients such as heavy metals, tar, and carbon monoxide.
Can quitting smoking reverse the risk of lung cancer?
Quitting smoking is always worthwhile, regardless of how long you’ve been doing it. Every year you don’t smoke reduces your risk of developing major illnesses like lung cancer. After 12 years of not smoking, your chances of acquiring lung cancer are more than halved compared to smokers.
How does smoking tobacco during pregnancy affect fertility in women?
Smoking tobacco during pregnancy can negatively impact fertility in women. For people with vaginas, it can lead to sexual dissatisfaction by decreasing lubrication and reducing the ability to reach orgasm. Smoking can also cause early menopause and affect hormone production, making it harder for women to conceive.
Additionally, smoking tobacco during pregnancy increases the risk of complications such as ectopic pregnancy, preterm birth, and low birth weight, further affecting both fertility and reproductive health.
What are the potential long-term effects on children born to mothers who smoke?
Prenatal smoking may also increase the risk of a number of child behavioral issues, including the externalization of aggressive and hyperactive behavior, extended periods of verbal or physical aggression and/or socially undesirable behavior (conduct disorder) throughout childhood, and delinquency later in life.
What organs are most impacted by tobacco use and cigarette smoking?
Tobacco use and cigarette smoking are harmful to nearly every organ in the body, including the heart, blood vessels, digestive organs, lungs, eyes, mouth, reproductive organs, bones, and bladder.

