Pediatric pneumonia is mostly caused by viral or bacterial pathogenic infections, and the treatment guidelines do not explicitly stage pediatric pneumonia. 2. Infection of the lower respiratory tract: the body’s resistance does not resist the invasion of pathogenic bacteria, the disease continues to develop, the bronchi and lungs are involved, resulting in less smooth breathing, fever, coughing, and even coughing up sputum, serious children will appear to increase respiratory rate, showing a decrease in oxygen saturation. 3. severe pneumonia stage: the respiratory system is severely damaged, and the child may even develop symptoms such as respiratory distress, hypoxia, and persistent high fever, and also coma, convulsions, frequent vomiting, and tarry stools due to the involvement of other systems; however, not all children develop severe pneumonia, and it mostly occurs in premature infants, children with underlying diseases, and other children with poor physical fitness; 4. recovery stage: after treatment, the The child’s signs gradually stabilize, shortness of breath begins to improve, body temperature begins to drop, digestive symptoms such as vomiting and diarrhea begin to improve, mental symptoms also begin to improve, convulsions disappear and mental status is good, reminding the child has begun to enter the recovery stage. Therefore, if a child has symptoms suspected of pneumonia, parents should not be careless and actively seek medical attention and receive treatment. If a child is diagnosed with pneumonia, he or she should drink more water, eat a light diet, have more ventilation, and take rest to recover as soon as possible.