Sputum does not affect the gastric tube much, but it should be dealt with aggressively. Irritation of the throat wall by the gastric tube can produce sputum, as can a combined lung or upper respiratory tract infection. Different treatment measures should be taken according to different situations. 1. Gastric tube stimulation produces sputum: Gastric tube stimulation of the throat wall may produce sputum, which can be treated with suction according to the situation. 2. Lung or upper respiratory tract infection: Lung or upper respiratory tract infection can cause increased sputum, sputum should be taken for culture, and according to the results, appropriate antibiotics should be selected for treatment, such as cephalosporin. It can also be combined with the use of budesonide and ipratropium bromide nebulized inhalation for sputum treatment. All of the above medications and suction should be administered under the supervision of a doctor. Elderly people with gastric tube should seek for doctor’s treatment when they produce sputum to avoid delaying the condition.