The nose, pharynx, larynx, ear are parts of the body that are in close contact with the environment and protect us from disease-causing microbes that try to enter the body. And here are special receptor cells that receive irritation signals and are responsible for transmitting them to the brain, from where a command then comes to the occurrence of this or that sensation. Each of the numerous diseases of ENT organs has its own symptoms and clinical picture. In this book, we will tell you about the most common ones.