The people sensitive to alergic eye ailments are usually having the history of allergic rhinitis and atopic dermatitis with powerful hereditary allergic history. The symptoms of eye alergy generally appear before attaining 30 years age.

The situation for causing allergic symptoms is almost similar for the eyes as that of the nose.

The allergens develop the alergy antibody – IgE for coating various mast cells in the conjunctiva. These mast cells are promoted to discharge histamine and other mediators when re-exposed to the allergens. This may lead to itching, burning, runny nose that turns red because of inflammation which ends up in congestion. Often the conjunctiva swells with fluid and obtrudes from the eye surfaces like hive on the eye. Both the eyes are affected by the eye allergic reactions.