1. What is tracheitis in children? Children\’s tracheitis refers to a disease in which the tracheal mucosa and cartilage are inflamed, causing respiratory obstruction. It usually occurs most frequently in winter and spring, and is more common in children under 2 years old, especially those between 6 months and 3 years old. 2. Symptoms of bronchitis in children 1. Cough: It starts as a dry cough and gradually turns into a wet cough later. 2. Shortness of breath: Difficulty breathing due to obstruction of the airway. 3. Fever: Most patients will have varying degrees of fever.