Gianotti-Crosti syndrome is rare and hard to diagnose — and usually goes away on its own. Mandy Moore shared her son’s case, and now experts share what you should know.

Actress Mandy Moore's 2-year-old son developed a rare rash called Gianotti-Crosti syndrome, which causes itchy blisters on the arms, legs, buttocks and face. The rash usually comes after a viral ...

Gianotti-Crosti syndrome is rare and hard to diagnose — and usually goes away on its own. Mandy Moore shared her son’s case, and now experts share what you should know.