Dark circles under the eyes are a cosmetic condition you may work to cover with makeup, but they may also be caused by allergies. According to the Mayo Clinic, dark circles may be caused by heredity, sun exposure, age and allergies. Several different sources of allergens can contribute to dark circles. Dark circles may diminish if the underlying allergen causing them is found and eliminated or treated with antihistamine medicines.
Seasonal
Seasonal allergies, such as hay fever, may cause dark under-eye circles. Pollens, trees, ragweed and grasses are common causes of seasonal allergies, and is most often accompanied by nasal congestion, according to Merck.
Environmental
Common allergens in the environment, such as dust, mold, mildew and smoke may also cause dark circles under the eyes. Pet dander from cats, dogs or rodents may also cause allergies, as can cockroaches and dust mites.
Food
Food allergies are more common in children than adults, but anyone can be affected. According to the Asthma and Allergy Foundation of America, 90 percent of food allergies are caused by one of the same eight foods: wheat, milk, soy, eggs, fish, peanuts, tree nuts and shellfish.
