Coughing is a natural protective mechanism designed to clear bacteria, viruses, dust, and pollen out of the body. Coughing clears the lungs and throat of irritants and fluids. A productive cough forces sputum from the breathing tract, thereby clearing the air passages and allowing oxygen to reach the lungs.
A cough is also a common symptom of diseases of the ear, nose, and throat. Coughing may be related to a bacterial or viral infection of the respiratory tract, such as bronchitis, laryngitis, pneumonia, or croup. A cough can also be caused by inhaling irritating substances, such as dust, chemical fumes, or cigarette smoke. Food sensitivities and environmental allergies can cause a cough, as can inhaling very cold or very hot air. If your child has a persistent cough, emotional stress is another important factor to consider.
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