Do you regret it, or don't you notice it now?
My little girl is 9 months and still has a VERY flat head. I researched helmets around 4 months but decided against it, mainly because the flatness is pretty much all at the back and her features are completely symmetrical, ears not misaligned or anything. It seemed a bit extreme for what is only a cosmetic issue (she has been checked by the paediatrician who confirmed that there's nothing medical going on). She's got a special mattress and pillow (which is used only in the buggy and car seat). She spends barely any time on her back anymore but the flatness doesn't seem to improve at all. It is bad and other rude people have commented on it. I am kicking myself for not going for a helmet, but feel that it's probably not worth it now because any improvement would be limited at this stage.
Is it true that once she has a bit of hair it won't really be noticeable? Or is this likely to bother her for the rest of her life? 