Pneumonia refers to the terminal airways, alveolar and pulmonary interstitial inflammation. Its symptoms: Fever, shortness of breath, persistent cough, there may be unilateral chest pain, take a deep breath, and coughing chest pain, there is a small amount of sputum, or a large number of sputum, may contain bloodshot. Children suffering from pneumonia, the symptoms often not obvious, there may be a mild cough or no cough. Should pay attention to timely treatment.