Bronchitis tends to manifest suddenly and with typical symptoms in children compared to adults. In cases of acute bronchitis, it can lead to fever, chills, and fatigue. Typical respiratory symptoms include coughing, expectoration, and difficulty breathing. Severe cases may also show signs of oxygen deprivation such as cyanosis of the lips and changes in nail color; additionally, scattered dry rales can be heard in the lungs, and when there is more sputum, wet rales can be heard at the base of the lungs. It is necessary to promptly choose penicillin-type antibiotics to control the infection and use medications to dilute the sputum for symptomatic treatment. (Medication should be used under the guidance of a doctor based on specific conditions.)