Pneumonia is an important common disease in infancy and is the first cause of death in hospitalized pediatric patients in China, posing a serious threat to pediatric health. The common symptoms of pediatric pneumonia include the following: 1. General symptoms: (1) Fever: It is the most common clinical symptom, and the type of fever manifested varies depending on the age and pathogen. Some newborns or children with heavy malnutrition may have a temperature that does not rise or is lower than normal; (2) loss of appetite, depression or irritability; (3) refusal to eat, choking, vomiting are common in small infants, and in severe cases, symptoms such as respiratory distress, significant wheezing, and altered consciousness. (2) Respiratory symptoms: frequent irritating dry cough at the beginning, followed by phlegm sound in the throat, vomiting and milk choking when coughing is intense. When the symptoms worsen, the respiratory surface becomes faster, the nose flaps, and some children may have mild cyanosis around the mouth and nails. The doctor may hear small and medium-sized blistering sounds in the lungs on auscultation; if no blistering sounds are heard, the doctor may ask the child to have a chest x-ray to diagnose the suspected pneumonia. 3. Severe pneumonia can also combine with other organ symptoms throughout the body: heart failure can occur if the liver is enlarged, the face is pale, the limbs are edematous, and the urine output is reduced; lethargy, staring, and convulsions can occur with toxic encephalopathy. It is important to pay high attention to pediatric pneumonia and treat it actively.