Being thrust into the spotlight has drawn attention to a thin scar on the left side of her face, which Fey explains in the January issue of Vanity Fair was the result of a childhood attack.
"It's impossible to talk about it without somehow seemingly exploiting it and glorifying it," says the 38-year-old comedian.
When Fey was only 5 years old and living in Upper Darby, Penn., a stranger attacked her out of the blue.
Explains her husband, Jeff Richmond: "It was in, like, the front yard of her house, and somebody who just came up, and she just thought somebody marked her with a pen."
Fey dealt with the trama well though and didn't think of the resulting scar until adulthood.
"I proceeded unaware of it. I was a very confident little kid. It's really almost like I'm kind of able to forget about it, until I was on-camera," says Fey, who often shoots scenes with her right side to the camera.
Also in the interview, the 5-foot 4-inch actress reveals how she was had to lose 30 pounds when she started at "Saturday Night Live" and addresses the criticism about her spoof of vice-presidential candidate Palin.
"What made me super-mad about it was that it seemed very sexist toward me and her," she says. "The implication was that she's so fragile, which she is not. She's a strong woman.
"And then, also, it was sexist because, like, who would ever go, 'Well, I thought it was sort of mean to Richard Nixon when Dan Aykroyd played him,' and 'That seemed awful mean to George Bush when Will Ferrell did it.'"Copyright © 2015, The Baltimore Sun