The poor resistance of the pediatric organism to disease makes it highly susceptible to invasion by external pathogens that can cause pneumonia. Pediatric pneumonia is characterized by a number of systemic symptoms, localized respiratory symptoms, and symptoms of hypoxia caused by disease progression. Pneumonia, like other respiratory diseases, can present with more obvious respiratory symptoms, the most common of which are cough, sputum, chest pain, and shortness of breath. Younger children may be less articulate about chest pain because they cannot express it, but older children can clearly articulate the discomfort of chest pain because they are more verbal. In addition, wheezing often occurs in children with pneumonia, mainly due to spasm of the smooth muscles of the airways caused by inflammation. Coughing sputum may be related to the pathogen of the infection and can present with different sputum properties. Pneumonia due to viral infections generally has less sputum and is thin, while pneumonia due to bacterial infections may present with thicker, more abundant sputum due to increased secretion from the respiratory tract. Since pneumonia is an infectious disease, it mostly presents with systemic manifestations due to toxins secreted by bacteria and viruses. These toxins may cause fever, drowsiness, and depression in children, and because they can affect the gastrointestinal tract, they can also suffer from lack of desire to eat and vomiting. Pneumonia that cannot be effectively treated can even lead to serious problems such as shock and coma. As the disease progresses, pneumonia can affect the respiratory area of the lungs, reducing the inhalation of oxygen and the discharge of carbon dioxide, and some symptoms of hypoxia can occur. Hypoxia that cannot be effectively corrected may lead to cyanosis of the lips, mucous membranes, and the ends of the limbs. In pediatric pneumonia, symptoms vary in severity and are mainly related to the type of pathogen and treatment. Pediatric pneumonia is also variable, which is mainly due to the poor resistance and weak compensatory capacity of the pediatric organism, and the disease can progress rapidly.