It is widely thought that allergies are a seasonal nuisance causing watery eyes and sneezes. In reality, allergies can be a life-threatening problem, and they affect millions of people. It is important for readers to learn the facts about common and rare allergies to take control of their own health and better understand this topic, which is often discussed in the media. Informative charts, engaging sidebars, and annotated quotes by medical experts make readers aware of different types of allergies, how they are treated, and how people can become more helpful and compassionate toward those who suffer from them.