Sometime over the last week a white dot has appeared on LOs lower gums, at the front. He's been showing signs of teething for what feels like forever, but no teeth have appeared yet.

I don't think this dot is a tooth, as it's not quite in the right place on his gum (it's right at the very front). I'm pretty sure it's not thrush or anything like that, as it's hard and can't be rubbed off. The rest of his mouth is normal!

Anyone seen one of these before?