Your smoke is also bad for other people - they breathe in your smoke secondhand and can get many of the same problems as smokers do. Children exposed to secondhand smoke have a higher risk of ear infections, colds, pneumonia, bronchitis, and more severe asthma.
Mothers who breathe secondhand smoke while pregnant are more likely to have preterm labor and babies with low birth weight.
Smoking also causes heart disease, stroke, aortic aneurysm (a balloon-like bulge in an artery in the chest), chronic obstructive pulmonary disease (COPD) (chronic bronchitis and emphysema), diabetes, osteoporosis, rheumatoid arthritis, age-related macular degeneration, and cataracts, and worsens asthma symptoms in adults.
Smokers are at higher risk of developing pneumonia, tuberculosis, and other airway infections (1–3).
Of the more than 7,000 chemicals in tobacco smoke, at least 250 are known to be harmful, including hydrogen cyanide, carbon monoxide, and ammonia (1, 2, 5).
Among the 250 known harmful chemicals in tobacco smoke, at least 69 can cause cancer.Tobacco smoke contains many chemicals that are harmful to both smokers and nonsmokers.Breathing even a little tobacco smoke can be harmful (1-4).E-cigarettes often look like cigarettes, but they work differently. We do know they contain nicotine, the same addictive substance in tobacco cigarettes.E-cigarettes also expose non-smokers to secondhand aerosols (rather than secondhand smoke), which contain harmful chemicals.There's no way around it; smoking is bad for your health.It harms nearly every organ of the body, some that you would not expect.Smoking makes it harder for a woman to get pregnant.A pregnant smoker is at higher risk of miscarriage, having an ectopic pregnancy, having her baby born too early and with an abnormally low birth weight, and having her baby born with a cleft lip and/or cleft palate (1). Surgeon General, and the International Agency for Research on Cancer have classified secondhand smoke as a known human carcinogen (cancer-causing agent) (5, 11, 12).These forms of tobacco also contain harmful chemicals and nicotine.Some cigars contain as much tobacco as an entire pack of cigarettes. Not much is known about the health risks of using them.