What Happens in Your Body When You Quit Smoking?

Acıbadem Altunizade Hospital Chest Disease Specialist Assoc. Dr. Hacer Kuzu Okur emphasized that the person who quit smoking experienced positive developments in his/her body in the first 20 minutes. Here are the changes.

In the first 8 hours:

Bad smell in the breath, oxygen and carbon monoxide level in your blood returns to normal.

At the end of day 1:

The risk of a heart attack begins to diminish within 24 hours.

At the end of day 2:

Sense of smell and taste start to increase in 48 hours.

At the end of the 3rd day:

The problem of breathlessness starts to decrease and breathing becomes easier. Problems such as fatigue and headaches are also diminishing as the amount of carbon monoxide in the vicinity starts to decrease.

After 2-12 weeks:

Circulation is starting to improve, if there is a complaint of coughing, the sputum problem is reduced to half. As the immune system starts to get stronger, the walking becomes easier and the lung functions begin to improve.

Within 3-9 months:

Cough and shortness of breath are decreasing, the risk of infection is decreasing and the energy is increasing.

1 year later:

The risk of developing heart disease and heart attack is halved.

After 5 years:

The risk of COPD is reduced by half and the risk of stroke is reduced.

10 years later:

The risk of lips, trachea, esophagus cancer is reduced by half.

After 15 years

The risk of cardiovascular disease is equal to the person who never smokes.

After 15-20 years

Lung cancer risk is reduced by 50-90 percent.


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