Allergy is an immune system disorder, medication and infection, arises when the immune system responds to an allergen. The harshness of allergies differs from person to person and from negligible irritation to life threatening anaphylaxis. It causes red eyes, itching, runny nose, hives, eczema and asthma attack. General treatment of allergy is to avoid allergens and medication; in severe cases few medicines can decrease symptoms as antihistamines and decongestants.
Last date updated on September, 2014