Pneumonia is a familiar disease that is usually caused by bacteria, viruses or other pathogenic microorganisms in the lower respiratory tract and has a high incidence among children. When a baby is sick, it is important to make accurate judgments based on the baby’s manifestations, especially to differentiate it from a cold and to treat it symptomatically. The clinical manifestations of pneumonia are divided into systemic and local manifestations. Systemic manifestations: persistent fever, which usually lasts for more than 3 days with no decreasing trend in body temperature. Along with the fever, the baby will experience extreme fatigue, poor mental depression and loss of appetite, which is very different from the baby’s usual temperament. Local manifestations: The baby will have a persistent, violent cough, accompanied by nasal congestion, runny nose, etc. Sometimes there will be coughing sputum, and individual babies will have difficulty breathing due to persistent coughing, or even breathing difficulty and cannot lie down, or accompanied by wheezing, poor sleep quality at night, and other symptoms. The above systemic and local symptoms are gradually aggravated without any tendency of relief. However, it does not mean that your baby has a fever, cough, or phlegm, which means that he or she has a real pneumonia, but further examination is needed to confirm the diagnosis.