Allergies are the body's reaction to a substance it views as a harmful invader. Allergies occur when a person's immune system reacts to substances in the environment that are harmless for most people. These substances are called allergens and are found in the house as dust mites, pets, pollen, molds and certain medicines. An Allergic Reaction is the way the body responds to the allergen. A chain of events occur that result in an allergic reaction. While Allergy symptoms can be classified as mild, moderate or severe, some of the common symptoms include hay fever, abdominal pain, cramps, vomiting, and many more. People can be allergic to a wide variety of substances, but the common Causes of Allergy Treatment are pollen and dust mites. While seasonal allergic rhinitis, or hay fever, is an allergic response to pollen, dust mites are tiny organisms that live in the dust and in the fibers of household objects such as pillows, carpet and upholstery. No matter the type of allergy you have, the best line of treatment is to avoid the allergen. Although avoiding the allergen is an important treatment approach, it does not completely end the allergic reaction. Medication such as antihistamines, decongestants or a combination of over-the-counter and prescription medications are used to treat allergy symptoms. Skin allergy is also treated with the help of medications.