In urban environments, our nose filters up to a thousand liters of polluted and dusty air every day. Faced with an incredible number of harmful substances, allergens and microbes, the human nose - a unique natural air conditioner - increasingly fails. A runny nose and nasal congestion are seemingly harmless symptoms, but without treatment they can lead to serious health problems: diseases of the paranasal sinuses, diseases of the ear, pharynx, lower respiratory tract, lungs, heart and blood vessels. A book written by Honored Doctor of the Russian Federation, Professor Gennady Zakharovich Piskunov will help you avoid these unpleasant consequences, and will also allow you to get your bearings and begin proper treatment. After all, most diseases can be overcome if measures are taken in time! The information contained in the book cannot serve as a substitute for consulting a doctor. You should consult with a specialist before taking any recommended action.