Allergic Shiners: A Not-so-shiny Sight 1
A dark circle under the eye is usually a sign of exhaustion or a fight. However, this is also a symptom of allergies. Allergic shiners are also called allergic facies or periorbital venous congestion/periorbital hyperpigmentation. While the discoloration is harmless, having it or seeing it on someone can be very worrisome.