Different Types of Allergies

An allergy is the immune system's response to something that is normally harmless, such as dust or pollen. However, allergies can be broken down into many different types, such as when they occur and what causes them.
 
For example, seasonal allergies such as hay fever occur at specific times of the year. Other allergies can occur year-round; these reactions, known as perennial allergies, are more difficult to treat. With either type, the reactions are often treated with medication and by minimizing contact with allergens. In some cases, shots may also be used.
 
The allergens that most commonly cause seasonal allergies include:
 
  • Tree pollen
  • Grass pollen
  • Weeds
  • Fungi and molds.
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The allergens that most commonly cause perennial allergies include:
 
  • House dust
  • Dust mites
  • Animals.
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In addition to airborne allergies such as the ones listed earlier, people may have allergic reactions to things like latex or certain foods.
 
(Click Allergies to learn more about the different types of allergies. This article also discusses the difference between allergies and chemical sensitivity.)
 

Different Types of Allergies

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