Children with a runny nose, cough and fever are considered to be caused by colds, but may also be the emergence of bronchitis, pneumonia and other diseases. 1. Colds, due to the invasion of bacteria and viruses into the child’s body may lead to children with upper respiratory tract infections, which will produce such symptoms. 2. Bronchitis, some children have bronchitis due to inflammation gathering may lead to children’s body metabolism abnormality, so this symptom may appear. 3. Pneumonia, some children with pneumonia after the lungs are stimulated by pathogens, which may lead to decreased lung function, increased secretion, accompanied by a runny nose, cough, fever and other symptoms. Children with a runny nose, cough and fever, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to determine the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.