Smoking

Health concerns usually top the list of reasons people give for quitting smoking. This is a very real concern: smoking harms nearly every organ of the body. Half of all smokers who keep smoking will end up dying from a smoking-related illness. In the United States alone, smoking is responsible for nearly 1 in 5 deaths, and about 8.6 million people suffer from smoking-related lung and heart diseases.

Nearly everyone knows that smoking can cause lung cancer, but few people realize it is also linked to higher risk for many other kinds of cancer too, including cancer of the mouth, nose, sinuses, voice box (larynx), throat (pharynx), esophagus, bladder, kidney, pancreas, cervix, stomach, and acute myeloid leukemia.

Smoking greatly increases your risk of getting long-term lung diseases like emphysema and chronic bronchitis. These diseases make it harder to breathe, and are grouped together under the name chronic obstructive pulmonary disease (COPD). COPD causes chronic illness and disability, and gets worse over time— COPD is potentially fatal. Emphysema and chronic bronchitis can be found in people as young as 40, but usually appears later in life when the symptoms worsen. Long-term smokers have the highest risk of developing severe COPD. Pneumonia is also included on the list of diseases known to be caused by smoking.

Smokers are twice as likely to die from heart attacks as are non-smokers. Smoking is a major risk factor for peripheral vascular disease, a narrowing of the blood vessels that carry blood to the leg and arm muscles. Smoking also affects the walls of the vessels that carry blood to the brain (carotid arteries), which can cause strokes. Smoking can cause abdominal aortic aneurysm, in which the walls of the body's main artery weaken and separate, often causing sudden death. Men who smoke are more likely to develop erectile dysfunction (impotence) because of blood vessel disease.

Smoking causes an increased risk of macular degeneration, one of the most common causes of blindness in older people. It promotes cataracts, which cloud the lens of the eye. It also causes premature wrinkling of the skin, bad breath, gum disease and tooth loss, bad-smelling clothes and hair, and yellow fingernails.

Women have some unique risks linked to smoking. Women over 35 who smoke and use birth control pills have a higher risk of heart attack, stroke, and blood clots of the legs. Women who smoke are more likely to miscarry (lose the baby) or have a lower birth-weight baby. Low birth-weight babies are more likely to die, or have learning and physical problems.

Based on data collected in the late 1990s, the US Centers for Disease Control and Prevention (CDC) estimated that adult male smokers lost an average of 13.2 years of life and female smokers lost 14.5 years of life because of smoking. Each year, smoking causes early deaths for about 443,000 people in the United States. Considering the diseases that smoking can cause, it can rob you of your quality of life long before you die. Smoking-related illness can limit your activities by making it harder to breathe, get around, work, or play.