Scarlett Johansson and her The Avengers co-stars all set up meetings with dermatologists when the summer blockbuster wrapped - because they all had rashes and skin problems from their tight-fitting costumes.
The actress reveals none of the cast were thrilled with their superhero outfits - because they were designed to dazzle onscreen and not for comfort.
And she admits her Black Widow latex catsuit was "a bit of a challenge".
She tells Usa Today, "The material is like a torture chamber. I literally had to peel it off.
"We all had skin conditions going with our outfits after 15 hours of non-stop sweat. I was sending pictures to my dermatologist in Los Angeles."