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  • Allergies - NHS
    An allergy is where your body reacts to something that's normally harmless like food, pollen, dust, insect bites or animals The symptoms can be mild, but for some people they can be very serious
  • What Causes Allergies? Common Allergens Other Factors
    Allergies develop when your immune system reacts to a foreign substance called an allergen, like pollen, bee venom, pet dander, or food Learn more
  • What causes allergies? - Bupa UK
    Usually allergies begin in childhood, but you can also develop them later in life You may be allergic to just one type of allergen (such as pollen), or you could have multiple allergies
  • Allergies - Symptoms and causes - Mayo Clinic
    Allergies happen when the immune system reacts to a foreign substance that gets inside the body These substances are known as allergens They include pollen, bee venom and pet dander Allergies also can happen due to certain foods and medicines that don't cause reactions in most people
  • Allergies: Types, Symptoms, Treatment Management
    What causes allergies? Allergies happen when your immune system mistakenly identifies foreign proteins — in pollen, pet dander, medications, food or other substances — as something harmful (as if it were a virus or bacteria)
  • What Causes Allergies? | Medicine, Chemistry, Facts | Britannica
    Allergic reactions are caused by substances known as allergens These substances can be found in a variety of sources such as pollen, mold spores, dust, animal dander, and certain foods
  • Allergies - NHS inform
    Allergies occur when the body’s immune system reacts to a particular substance as though it’s harmful It’s not clear why this happens, but most people affected have a family history of allergies or have closely related conditions such as asthma or eczema
  • Allergies: Symptoms, Causes, Treatment - Patient
    What causes allergies? An allergy is a response by the body's immune system to something (called an allergen) that is not necessarily harmful in itself Certain people are sensitive to this allergen and have a reaction when exposed to it
  • What are allergies? - nhsgp. net
    What causes allergies? Allergies are caused by your immune system overreacting to a specific substance, resulting in symptoms such as a rash, swelling, or digestive problems
  • Allergies Overview: Symptoms, Treatments, and More - Healthline
    An allergy is an immune system response to a foreign substance that’s not typically harmful to your body Learn more about the types, causes, and symptoms of allergies, and how they're





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