The "Blue Lagoon" star, 50, refused to let the injury interfere with her duties as emcee of the Bow Wow Meow Ball at the Animal Rescue Fund Of The Hamptons event.
Shields is yet to reveal the exact nature of her ailment, but she shared a photo of her wrapped foot in a post on Instagram.
"My annual injury! 10 stitches only this summer. Bummer for surfing and tennis," she wrote.