In urban conditions, our nose filters daily up to a thousand liters of polluted and dusty air. Faced with an incredible number of harmful substances, allergens and microbes, the human nose - a unique natural conditioner - is increasingly failing. 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. The book, written by the Honored Doctor of the Russian Federation, Professor Gennady Zakharovich Piskunov, will help to avoid these unpleasant consequences, and will also allow you to navigate and start the correct treatment. After all, most diseases can be defeated if measures are taken in time!