You may think you have a summer cold, but summer allergies may actually be to blame. The American College of Allergy, Asthma and Immunology lists the following warning signs of allergies: dark circles below the eyes, swollen adenoids that cause the face to look tired and droopy, a nasal crease that forms on the bridge of the nose, and breathing through the mouth due to nasal congestion.
American College of Allergy, Asthma and Immunology, May 2016