The line you mention is a normal suture or division between 2 sections of the skull bones on your baby's forehead.This will close when your baby is about 18 months old. However when this line becomes more noticeable and ESPECIALLY IF HIS EYES APPEAR TO BE SUNKEN this may be an important sign that your baby is DEHYDRATED! It would be best to take your baby to be seen at an emergency paediatic unit to be examined.
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