4-year-old children get up in the morning coughing up yellow sputum may be pharyngitis, sinusitis, respiratory tract infections and other causes. 1. Pharyngitis: This disease is an inflammation of the mucous membrane of the pharynx, manifested by a foreign body sensation in the pharynx, burning sensation, itching, dryness or sore throat. Often there are thick secretions attached to the pharynx, which can cause coughing and coughing up yellow sputum in the morning. 2. Sinusitis: Sinusitis nasal secretions can flow back to the back wall of the throat, irritating the throat, causing cough, especially after getting up in the morning, more secretions, can appear in the morning cough yellow sputum symptoms. 3. Respiratory tract infections: such as bronchitis, pneumonia, can show cough, cough sputum, sputum white or yellow, and even asthma and other symptoms. 4-year-old children coughing up yellow sputum in the morning persistently unrelieved, need to be under the guidance of a doctor to clarify the cause of the disease, standardized treatment.