Allergy : A Hypersensitive Disease

An allergy is everything from a runny nose, itchy eyes and palate to skin rash. In fact, allergies can be caused by just about any substance that you inhale or swallow, or that touches your skin.

It aggravates the sense of smell, sight, tastes and touch causing irritation, extreme disability and sometimes fatality. It occurs when the body's immune system overreacts to normally harmless substances.

Not only do allergies cause a range of annoying symptoms, such as sneezing and itchy eyes, but they can aggravate or trigger other conditions such as asthma, sinusitis, and ear infections. For example, when allergies cause inflammation in your nasal passages, the opening to your sinuses can become blocked, leading to sinus inflammation, sinus infections, and sinus pain. Similarly, if allergies cause inflammation in your ear canal, the ears don't drain properly, which can lead to ear infections.