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Allergies occur when your immune system reacts to a foreign substance—such as pollen, bee venom or pet dander—or food that doesn’t cause a reaction in most people.
Your immune system produces substances known as antibodies. When you have allergies, your immune system makes antibodies that identify a particular allergen as harmful, even though it isn’t. When you come into contact with the allergen, your immune system’s reaction can inflame your skin, sinuses, airways or digestive system.
The severity of allergies varies from person to person and can range from minor irritation to anaphylaxis—a potentially life-threatening emergency. While most allergies can’t be cured, treatments can help relieve your allergy symptoms.
Allergy symptoms, which depend on the substance involved, can affect your airways, sinuses and nasal passages, skin, and digestive system. Allergic reactions can range from mild to severe. In some severe cases, allergies can trigger a life-threatening reaction known as anaphylaxis.
It is important to know the symptoms associated with the different types of allergic reactions. Read on to find out more.
Hay fever, also called allergic rhinitis, can cause:
A food allergy can cause:
An insect sting allergy can cause:
Atopic Dermatitis, an allergic skin condition also called eczema, can cause skin to:
Some types of allergies, including allergies to food and insect stings, can trigger a severe reaction known as anaphylaxis. A life-threatening medical emergency, anaphylaxis can cause you to go into shock.
Signs and symptoms of anaphylaxis include:
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