Smoking after a lung infection may lead to worsening of coughing symptoms or irritation of the throat leading to congestion and edema in the throat area. Smoking after a lung infection can also lead to a decrease in the patient’s appetite, thus potentially affecting the recovery of the disease. Moreover, smoking after a lung infection can also lead to increased inflammation in the affected airways, which is also not conducive to recovery. Therefore, after a lung infection it is recommended to quit smoking, drink plenty of warm boiled water, go out into the fresh air more often, and it is best to avoid the stimulation of second-hand smoke as well as chemically irritating flavors. Because these conditions may lead to inflammation in the airways or airway spasm, which is not conducive to the recovery of the disease.