The 8-month-old child with phlegm in the throat and coughing can be treated according to the specific conditions of the child: 1. antibiotics may be needed because the situation of phlegm in the baby’s throat is usually caused by bacterial infections in the trachea and bronchus, so it is recommended to check the blood routine, C-reactive protein, chest X-ray, and antibiotics such as cephalosporin should be taken for treatment. 2. If the child’s symptoms are more serious, such as breathing difficulties and fever, the child should be sent to the hospital for further treatment.