What are allergies?

 Overview       Do you know? What are allergies? It is the human body's immune system reaction against the unknown substance that's not harmful to the body such as dust mites, insect sting, pet dander, or bee stings. What is dust mite allergy? These substances are called allergens. When our body's immune system rises up against these substances then allergy symptoms occur. They may include certain foods, metals and medications are common causes of severe reactions.   Symptoms       The symptoms of allergy depend on different factors. The allergy you experienced is due to different factors.  Allergy symptoms can influence our nasal passage, skin, airways, and digestive system. In some serious conditions, allergies can cause anaphylaxis (life-threatening reactions).  Treatment       The best way and the best treatment for the allergy are to avoid the substance that causes the allergy. Most of the allergens that cause the symptoms of allergies are airborne so a person cannot