Smoking harms nearly every organ of the body and diminishes a person’s overall health. Smoking is a leading cause of cancer and of death from cancer. It causes cancers of the lung, esophagus, larynx (voice box), mouth, throat, kidney, bladder, pancreas, stomach and cervix, as well as acute myeloid leukemia.
Smoking also causes heart disease, stroke, lung disease (chronic bronchitis and emphysema), hip fractures and cataracts. Smokers are at higher risk of developing tuberculosis, pneumonia and other airway infections. A pregnant smoker is at higher risk of having her baby born too early and with an abnormally low weight. A woman who smokes during or after pregnancy increases her infant’s risk of death from Sudden Infant Death Syndrome (SIDS).
Regardless of their age, smokers can substantially reduce their risk of disease, including cancer, by quitting.
The immediate health benefits of quitting smoking are substantial. Heart rate and blood pressure, which were abnormally high while smoking, begin to return to normal. Within a few hours, the level of carbon monoxide in the blood begins to decline. (Carbon monoxide, a colorless, odorless gas found in cigarette smoke, reduces the blood’s ability to carry oxygen.) Within a few weeks, people who quit smoking have improved circulation, don’t produce as much phlegm and don’t cough or wheeze as often. Within several months of quitting, people can expect significant improvements in lung function.
Quitting smoking reduces the risk of cancer and other diseases, such as heart disease and lung disease, caused by smoking. People who quit smoking, regardless of their age, are less likely than those who continue to smoke to die from smoking-related illness. Studies have shown that quitting at about age 30 reduces the chance of dying from smoking-related diseases by more than 90 percent. People who quit at about age 50 reduce their risk of dying prematurely by 50 percent compared with those who continue to smoke.
Quitting smoking substantially reduces the risk of developing and dying from cancer, and this benefit increases the longer a person remains smoke free. However, even after many years of not smoking, the risk of lung cancer in former smokers remains higher than in people who have never smoked. The risk of premature death and the chance of developing cancer due to cigarettes depend on the number of years of smoking, the number of cigarettes smoked per day, the age at which smoking began, and the presence or absence of illness at the time of quitting.
Many ex-smokers say quitting was the hardest thing they ever did. Do you feel hooked? You’re probably addicted to nicotine. Nicotine is in all tobacco products. It makes you feel calm and satisfied. At the same time, you feel more alert and focused. The more you smoke, the more nicotine you need to feel good. Soon, you don’t feel “normal” without nicotine. It takes time to break free from nicotine addiction.
Quitting is also hard because smoking is a big part of your life. You enjoy holding cigarettes and puffing on them. You may smoke when you are stressed, bored or angry. After months and years of lighting up, smoking becomes part of your daily routine. You may light up without even thinking about it.
Smoking goes with other things, too. You may light up when you feel a certain way or do certain things. For example:
- Drinking coffee, beer or hard liquor
- Talking on the phone
- Driving
- Being with other smokers
When you quit smoking, you may feel strange at first. You may feel dull, tense and not yourself. These are signs that your body is getting used to life without nicotine. It usually lasts only a few weeks.
Many people just can’t handle how they feel after they quit. They start smoking again to feel better. Most people slip up in the first two weeks after quitting. This is when feelings of withdrawal are strongest. There are treatments that can help with feelings of withdrawal: these include nicotine replacement therapy (nicotine gum) and varenicline.