Children coughing and spitting white sputum may be related to colds, pharyngitis, allergic cough and other causes, need to be further differential diagnosis by the doctor. 1. Colds: Usually there will be nasal congestion, runny nose, coughing, coughing up phlegm and other symptoms, the color of phlegm can be white. 2. Pharyngitis: If a child suffers from pharyngitis, it can lead to pharyngeal mucosal congestion, edema, increased secretion, and coughing and spitting of white phlegm. 3. Allergic cough: If a child is exposed to allergens such as pollen, it can cause the child to cough and spit up white phlegm. It is recommended that parents take their children to the hospital in time to clarify the cause of the disease and standardize the treatment under the guidance of the doctor, so as not to delay the disease to bring adverse effects on the body.