What Is The Treatment For Dark Circle Under The Eyes?

Hi!
My 5yr old daughter has dark cirlcles under her eyes. Every morning when she wakes up she sneezes alot and then the whole day she has a runny nose, with clear mucous coming out. Recently her pediatrician diagnosed her with a Vit d deficiency.She gets better though when shes soaking in the sun.
Does she have allergies ??
what are the food and juices that could help alleviate these symptoms??
Thanks!