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Q: 
My daughter, who suffers from nasal allergies, has large dark circles under both eyes and my mother-in-law is saying she looks like someone has given her black eyes or shiners. Why does she have these, and what causes them?
A: 
Nasal allergy symptoms (allergic rhinitis) can really beat up some patients. Dark circles under the eyes are due to swelling and discoloration from congestion of small blood vessels beneath the skin in this area. This can give the appearance of having "gone a few rounds" on the playground.The symptoms of allergic rhinitis often produce a combination of gestures and facial features, particularly in children and teens. The following are telltale characteristics that allergists look for to help diagnose nasal allergies: