The principle of nebulization for infant pneumonia: nebulization therapy is physical therapy, through the nebulizer to break down the drug into fine particles, through the method of inhalation, directly on the lesion, if there is inflammation, directly on the surface of the inflammation, so that the drug to play a greater role. If there is sputum mucus, it can be diluted or the sputum can be reduced by the drug to achieve the purpose of reducing symptoms and treating the disease. Nebulized inhalation with the mouth inhalation is better, through the breath can be directly into the trachea, bronchial tubes, and can even reach the lungs.