The 22-year-old actress made the revelations during a television show on May 4 and said she sustained a nasty "puncture wound" when filming additional hunt scenes, reported Us magazine.
"I was not trying to have ultimate swag when I walked out I hurt my foot. I was not trying to get out of wearing heels either. Puncture wound, promise!" she said.
Stewart and her co-star Robert Pattinson, 25, returned to Los Angeles from the film's Vancouver set.