A concerned mum was filled with fear when she noticed a huge black mark on her the top of her daughter’s mouth.

Darian Depreta was playing with her gorgeous little girl Bella when she spotted the massive circular mark.

She said: “So I’m playing with Bella today and notice the roof of her mouth is black.

“I try wiping it to see if it would come off, and it didn’t. I immediately call Chandler, my mom and best friend in a panic.

“I make her a doctors appointment that was about 30 minutes from the time I noticed her mouth.”

Doctors then suggested it could be a birth mark but Darian, who lives in the US, insisted it wasn’t as she checks her mouth regularly to clean it.

Darian said: “I’m now being told that my daughter will be set up with 2 specialists. After insisting it wasn’t a birthmark on the roof of her mouth, the NP decided to take another look at this medical mystery.

“I point out it looks a little white on the side and she really gets in there trying to scrape it.”

And then they realised what it actually was…

“ONLY TO FIND OUT IT WAS CARDBOARD FROM A BOX BELLA CHEWED STUCK TO THE ROOF OF HER MOUTH.

“I can never show my face in that office again. I cried/laughed for a solid 5 minutes straight.”