I think I remember one of my other kid going through the same thing, but since birth, at times, usually after nursing close to my body, exactly one half of Teddy's face is red. It's like a perfectly symmetrical difference from the top of his scalp down his nose and chin and everything. It's the side he's had up against me. It's freaky bc it literally is half way dividing his whole head. I do vaguely remember, like I said, one of my other ones getting it, but does anyone else have experience so I can put google behind me and ask at my next appt?