The symptoms of bronchitis in children mainly present as symptoms of upper respiratory tract infection. At the onset of the disease, symptoms such as chills, cold fear, high fever along with a runny nose and sneezing will appear, followed by coughing, expectorating phlegm, chest pain, and difficulty breathing. Severe cases may show signs of flaring nostrils, rapid breathing, and the three concave sign. Some patients may also experience symptoms like high fever leading to coma, so it is important to promptly use sensitive antimicrobial drugs and anti-inflammatory treatments, while also managing the fever to prevent febrile convulsions. (Medications should be used under the guidance of a doctor based on the specific circumstances.)