My 4 year old son has dark rings under his eyes. Could this be an allergic reaction?

by Joost J. Bakker IJmuiden
Question by Sarah: My 4 year old son has dark rings under his eyes. Could this be an allergic reaction?
I have never had my 4 year old son checked for allergies since I have no idea where to start or what foods he may be allergic to. For the past 2 years, he has had these dark circles under his eyes. I just assumed they were due to allergies, but I haven't had him checked for those either since I'm not sure how to go about it. The dark circles really bother me

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