A new study finds people who are resilient in the face of stressful events have a different mix of microorganisms in the gut than those who get more frazzled.

This itchy microbe really touches a nerve. A common skin bacterium can directly interact with a nerve cell to trigger an itch, new study shows, suggesting possible new therapies for itchy conditions.

Your skin's microbiome could use a break from soap and cosmetics, Dr. James Hamblin says. He ditched bathing for five years to harness the power of "good" microbes.