DD has developed a habit recently of biting either me, or when I won't let her, the nearest object or, more often, she will bite her arm. Really hard. Sometimes it's frustration because I won't let her have what she wants (yesterday it was the kitchen knifes!), but sometimes she gets upset out of the blue and I don't know why. She has silent reflux so I'm always wondering if she's having an episode and she's biting in pain, but am never sure. I don't think it's teeth, as she's not constantly chewing on things.
Anything I can do to stop the biting? It's awful to watch and bloody painful when it's me.