For those who suffer from them, allergies can be a very serious issue. Symptoms can range from sneezing, a runny or stuffy nose, scratchy throat, allergic shinners (dark circles under the eyes caused by increased blood flow to the sinuses), coughing, and itchy watery eyes, to eczema, or even asthma. In children, infants, and the elderly, asthma caused by allergies can be particularly serious. For some individuals, the symptoms are of a less specific nature, including frequent headaches, fatigue, and even snoring. In fact, many individuals suffer from symptoms for years without ever knowing they have an allergy - and that there is a simple solution that will relieve their chronic symptoms.

Allergies have many causes, including secondhand smoke, general pollution, dust mites, pollen, pet dander, and molds. Allergies can also be caused by sensitivities to one or more of several thousand chemicals and even perfumes.