Short Wave producer Hannah Chinn) has adult-onset eczema. They're not the only one. Up to ten percent of people in the United States have it, according to the National Eczema Association — and its prevalence is increasing. Despite its ubiquity, a lot about this skin condition remains a mystery. So today, Hannah's getting answers. They sat down with Raj Fadadu), a dermatologist at UC San Diego, to ask: What is eczema? What triggers it in the first place? And might climate change make it worse sometimes?**If you liked this episode, check out our episode on the science of itchiness). **Also, follow us! That way you never miss another Short Wave episode.*Interested in hearing more about climate change and human health? Email us at *[email protected]) — *we'd love to hear your feedback!*Learn more about sponsor message choices: podcastchoices.com/adchoices)NPR Privacy Policy)