"Allergy and sinus conditions are common in children, whose sinuses continue to develop well into the teen years. Allergy and sinus symptoms are similar, making a proper diagnosis a bit challenging. An ENT specialist can recommend diagnostic testing to help pinpoint the cause of what is ailing your child.When allergies are to blame, the immune system responds to a perceived threat by flooding the bloodstream with chemicals called histamines, which attack the offending substance but cause inflammation and swelling of the airways in the process. Common allergy triggers include pollen, mold, animal dander, dust mites, chemicals, medications, and certain foods.Pediatric sinusitis is usually the result of cold viruses, and may be aggravated by allergies. It can be either acute (short-term) or chronic (lasting longer than 12 weeks and recurring frequently). Distinguishing whether your child"s symptoms are the result of allergies or a sinus condition is the key to successful treatment.Symptoms of allergy and sinus conditions include runny nose, sneezing, stuffiness, coughing, sore throat, wheezing, headaches, snoring, and itchy eyes (these may also be watery) and nose.In addition to a physical examination, your child"s doctor will carefully inspect the ears, nose, and throat for signs of infection. Skin and blood tests will likely be administered to determine whether an allergen trigger is responsible."