During episodes of fussiness, my 6-week-old daughter has started grinding her face into my chest or shoulder. She shakes vigorously from side to side like she's trying to burrow out the other side. When this started with my wife's chest, we assumed it was a hunger cue. However, after watching it for a week or two we haven't found any correlation between the grinding behavior and the need to eat or suck. She will facegrind against a shoulder, chest, arm... it doesn't seem to matter (though she always looks quite determined).
Has anyone else here experienced this sort of behavior with an infant? As with most baby issues that come up, my question is what the hell is she trying to tell us?
It's worth noting that she will also swing or bang her head during fussy episodes. Disconcerting though that is, I'm told this is a strange but not uncommon attempt at soothing. Is facegrinding possibly in the same category?