Allsopp presents Location, Location, Location on Channel 4
TV's Kirstie Allsopp has accused the Daily Mail of "pathetic journalism" after it published an unflattering picture of her on its website.
The photo, since taken down, was used in an online article that accused the presenter of "sporting a moustache".
Speaking to 5 live's Richard Bacon, however, Allsopp said she had chloasma, a condition that causes discolouration in the faces of recent mothers.
"I was just gobsmacked," she said. "It was such a silly, nasty piece.
"Don't have a go at something thousands of women suffer from after having a baby."
Writing on micro-blogging site Twitter earlier, the Location, Location, Location presenter challenged Daily Mail editor Paul Dacre to an on-air debate.
Later, however, the 37-year-old mother of two was in a more conciliatory mood.
"I'm not interested in sticking it to the Mail," she said. "All I'd say is, you got it wrong this time - back up and pull your socks up."
A spokesperson for the Daily Mail said it had spoken to Ms Allsopp and that the situation had been "resolved".