An allergy is another word for hypersensitivity (overreaction). An allergy is medical condition in which the body's immune system has an overly exaggerated reaction to a particular substance. Over fifty million people in the United States have some type of allergies. Allergic reactions are the sixth leading cause of chronic diseases in Americans. About forty million people suffer from Hay Fever (seasonal allergies). Hay Fever is an allergy to pollen in the air. There are over a thousand known allergies that exist today. Theses allergies range from pet dander (hair, feathers, ect.) to food allergies, to drug allergies.

Allergy testing is a very common process in the United States. It is a process in which the result is to find out what you are and are not allergic to. At first your doctor will ask you questions about your medical history, family background, and give you a medical exam. After this examination, the doctor will know what you may be allergic to and can begin an allergy test. There are many types of allergy tests. The most common and most effective type is Prick Skin Testing. This is where a substance that you might be allergic to is placed on your skin (usually your back). Then you are pricked where the substance was placed. If the skin around the pricked area gets red and bumpy, it means you are allergic to the substance.

Anaphylaxis is a term that basically means a very serious allergic reaction. There are many symptoms of anaphylaxis, which include: breathing difficulty, nausea, swelling of the skin, vomiting, rash, diarrhea, low blood pressure, blisters, hives (itchy, red, and swollen skin), shock, passing out, heart attack, or even death. Histamines are naturally occurring chemicals in the body that come about as the result of allergens. Histamines cause many symptoms to occur, such as: inflammation (swelling) of the nasal passages, sneezing, runny nose, watery eyes, itching, dilatation of the capillaries (widening of small blood vessels), headaches, lung spasms, and cramps. Antihistamines, as the name suggests, are medications that block the flow of histamines and are used to treat allergies or allergic reactions.

There are many ways to prevent allergies. The most obvious is, finding out what you are allergic to, so you can stay away from them. Other ways include: having a healthy diet and proper nutrition, getting a lot of Vitamin C (it is a natural antihistamine), or taking allergy medication or supplements. Consult your doctor before taking any medications. Vitamin Depot Online.com offers Butterbur Extract with Standardized Rosmarinic Acid, which is a soft-gel caplet that contains petasin. Petasin is a chemical that reduces spasms in smooth muscle, resulting in a soothing sensation of swollen nasal passages.