Basics Of Allergy and Allergens

An allergen is any substance that the body mistakenly perceives as a threat, triggering a specific chain of events called an allergic cascade.

Allergies occur when the immunes system mistakes a harmless substance as being dangerous and attacksThe immune system protects the body from harmful foreign substances.Allergies occur when the immunes system mistakes a harmless substance as being dangerous and attacks Sometimes, it mistakenly identifies a harmless allergen as a threat.

The resulting allergic reaction causes symptoms, such as sneezing, coughing, runny nose, sore throat, diarrhea, vomiting, itching and hives. More severe reactions can result in lower blood pressure, difficulty breathing and, in some cases, death......

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