Oh dear, my Sim's daughter just aged up from a toddler to a child and she has a goatee!!! It looks like a small eyebrow just under her lip. I'm gonna restart the game etc. to see if it goes away, but just wanted to know whether this has happened to anybody else?! If it can't be fixed I guess she's in for a rough childhood LOL! Hopefully the problem resolves itself when she ages up...

lol Can you post a picture?
I had once a toddler with stubble in TS2, her dad had a photoshopped skin that the girl inherited and I didn't know the dad's stubble was painted into the skin.

I suspect you probably downloaded a custom hair that unlocks the goatee for both genders and the child age (via tags). Also, some major mods (such as twallans mods) can lend these sort of effects but nothing quite like this. If those aren't the cases then you have a unique medical mystery. Regardless, you have yourself a small problem...

Also, I lol'ed.

I've had this happen with "Transfer Genetics" in Twallan's Master Controller. I got a young adult with big boobs and hair all over them like a yeti. I should have taken a pic.

Could it be her teeth sticking through her lip? Especially with overslidering, you can end up with some pretty weird, freaky looking things including teeth poking through the mouth.

Half the population in Starlight Shores in my game suffer from a condition where they have a gree vines pattern stuck to their face. From afar is looks like a sea captain's bushy beard.

I noticed the same effect a couple of times; it was caused by a weird shadow thrown by the lower lip. Move the child next to a table lamp or something like that to see if that is the problem.

I think I've seen someone like this once before...

:X

Ha so apparently it is her tongue poking through her chin! it's meant to go away once she ages up... Thank God!! Oh Sims, so many funny glitches

"So my daughter doesn't really have hair on her chin it's just her tongue sticking out her chin! It's A-OK"

Hahaha! Couldn't have asked for a better outcome really

I've had this happen with Claire Ursine's child. It was a girl in my game, and when she grew up she had some weird pimple or something under her lip. I suspect it has to do with the sliders and face shape, Claire has always been weird-faced