Problems with the respiratory tract are the most common reason for patients visiting their GPs. This is because our system of airways is a very vulnerable interface with our environment. Consequently it is a way in for viruses, bacteria, potential allergens, pollutants and irritants and it is the primary location for the many illnesses associated with these triggers. Common Cold Allergic Cough Sinusitis Laryngitis Otorrhoea Tinnitus Asthma Pneumonia Allergic bronchitis