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Friday, 5/6/2026 | 18:02 GMT+7

What happens three months after quitting smoking?

Improved lung function, reduced coughing and shortness of breath, and enhanced blood circulation are positive changes the body experiences after quitting smoking.

Blood circulation in the body improves significantly after quitting smoking. According to Health Shots, after about three months, blood flow and lung function show marked improvement. The vasoconstriction caused by nicotine gradually diminishes, allowing blood and oxygen to be transported more efficiently to muscles, the heart, and the brain. Consequently, individuals who quit smoking often experience less fatigue, alongside enhanced stamina and a better mood.

Damaged cells and muscle tissues undergo repair. As the body enters the recovery process after quitting smoking, damaged blood vessels and tissues are gradually repaired. Reduced nicotine levels help decrease vasoconstriction, increasing blood circulation and lessening the burden on the heart. Consequently, those who quit smoking reduce their risk of cardiovascular disease and many other chronic illnesses.

Physical activity improves significantly. Quitting smoking enhances physical capabilities due to restored lung function, more efficient gas exchange, and better blood circulation. Cilia in the airways gradually recover, aiding in mucus removal, reducing coughing, and clearing the respiratory passages. This leads to more effective oxygen delivery to the body, decreasing shortness of breath during activity or exercise.

When smoking stops, the ability to transport oxygen to muscles improves, boosting endurance and exercise performance. Concurrently, a healthier cardiovascular and respiratory system also accelerates post-exercise recovery, allowing for sustained physical intensity for longer periods, according to Healthline.

Lung function gradually improves after quitting smoking. Cilia in the airways begin to recover, helping to remove mucus more effectively, thereby reducing coughing and shortness of breath. Carbon monoxide levels in the blood rapidly decrease, facilitating more efficient oxygen transport to tissues and cells.

To successfully quit smoking, individuals need determination, psychological preparation, habit changes, and appropriate support measures. The first weeks are the most challenging phase due to frequent nicotine withdrawal symptoms and cravings. When cravings emerge, try delaying for 5 to 10 minutes, sipping small amounts of water, or practicing slow, deep breaths to reduce stress.

Additionally, those quitting smoking should remove lighters, ashtrays, and any remaining cigarettes from their home or workplace. Cleaning clothes, curtains, and bedding to eliminate the smell of smoke also helps limit triggers for cravings and reduces the risk of relapsing.

By Le Nguyen (Compiled)

Readers can submit respiratory health questions here for doctors to answer.
By VnExpress: https://vnexpress.net/dieu-gi-xay-ra-sau-ba-thang-bo-thuoc-la-5081901.html
Tags: respiratory smoking lungs

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