If you've never suffered from back pain, chances are you know somebody who does. In the United States, seven out of every ten people will endure back pain at some time in their lives. For a common-sense discussion about an all-too-common ailment, be sure to watch this episode of Second Opinion.

Between 15 and 20 million Americans – including about 5 million children – have asthma, a chronic disease that makes it difficult to breathe. Asthma attacks can be frightening, even fatal, but they can also be treated and prevented. This episode of Second Opinion looks at the symptoms, causes, and diagnosis of asthma and how modern drug therapy can alleviate its effects.