Over the past few days dd has been making a weird noise with her mouth which sounds like teeth grinding. She only has 3 teeth and even they aren't fully grown (she is 10 months). Can she grind her gums? It is such a horrible sound and I'm wondering if she is trying to copy her dad as he grinds his teeth whilst sleeping (which I hate). She is full of cold at the moment so don't know if that is related to this noise. It is very odd!