Suctioning with a suction device for infants is not harmful in itself, but if it is not done properly, it can cause certain harms, including damage to the respiratory mucosa and different degrees of respiratory airway reactions. 1. Damage to the mucous membrane of the respiratory tract: Since infants have limited cooperation in sputum suction, improper sputum suctioning is likely to result in damage to the mucous membrane of the respiratory tract by the sputum tube, which may cause unnecessary injury to the infant. 2. Various degrees of respiratory and airway reactions: due to the irritation of the sputum tube on the infant’s throat during the operation, it may lead to temporary coughing symptoms and vomiting discomfort. If there is adverse irritation of the suction tube during suctioning, the infant may induce symptoms of dyspnea and hypoxia due to increased symptoms of pharyngeal edema. It is recommended that sputum suction for infants should be performed by a professional doctor to ensure the safety of the operation, and any discomfort during the suctioning process should be stopped promptly and symptomatic treatment should be given according to the doctor’s instructions.