Tracy Shaw had to pull out of her play The Blue Room after concussing herself by falling into scenery.
The accident, which also left her with a cut above her eye, meant she missed two performances of the show in Guildford, Surrey, this week.
The former Coronation Street actress plays 15 different women who all lust after the same man.
Her role, made famous by Nicole Kidman, sees her having to strip off for a steamy scene in the kitchen.
Tracy told The Sun: "I hate letting people down. I really wanted to go on. But I was suffering concussion, lost a lot of blood and felt drained. Now I have a Beckham scar."