There is no such thing as the “most effective” way to treat a 14 year old’s cough, it depends on the cause. The general 14-year-old cough may be a normal physiological phenomenon, but also may be caused by colds and other diseases, can be self-conditioning, oral medication and other methods to treat. 1. Normal physiological phenomenon: cough is a defensive reflex movement, can prevent foreign body inhalation, to prevent the accumulation of bronchial secretions, such as occasional coughing is usually a normal phenomenon, to avoid allergenic stimulation, as well as cold air stimulation, keep a light diet, avoid spicy and stimulating food, generally can be relieved. 2. Common cold: may also be accompanied by fever, runny nose, etc., should first identify the infecting bacteria, bacteria-specific medication, such as bacterial infections, you can use amoxicillin, such as viral infections can be generally self-cured. Coughing is the body’s normal way of expelling germs, it is not recommended to give children cough suppressants, you can take honey to relieve throat discomfort. If severe cough symptoms occur, you should consult a doctor in time, under the guidance of a professional physician. It is recommended to pay attention to rest during the cough, go out wearing a mask, do not go to crowded places. All of the above medications should be used under the guidance of a doctor, avoid self-medication.