Smoking is harmful to health.

When smoking, most of cigarette smoke is inhaled into the lungs, and a small part enters the digestive tract with saliva. Some harmful substances in smoke stay in the lungs, and some enter the blood circulation and flow to the whole body. Under the synergistic effect of carcinogens and cancer promoters, normal cells are destroyed, which can form many diseases such as cancer, hypertension, coronary heart disease, stroke, peptic ulcer, chronic bronchitis and emphysema.

The harm of smoking

The hazards of smoking include tar and nicotine, both of which are harmful to human body. Long-term smoking will cause these two substances to damage the mucosal wall of respiratory tract, leading to chronic inflammatory reaction, which is manifested as congestion and edema in different degrees, and a large amount of inflammatory secretions will seep out during acute attack, which is common in chronic bronchitis.

It is characterized by long-term cough, expectoration and chest tightness, and some patients may also cause lung cancer, such as bronchial lung cancer and alveolar cell carcinoma. Therefore, the harm of smoking includes not only nicotine, but also harmful components such as tar. Suggest quitting smoking.