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what is allergies

Allergies are an immune system overreaction to normally harmless substances called allergens. When an allergen enters the body, the immune system mistakenly identifies it as a threat and triggers a defensive response by producing antibodies called Immunoglobulin E (IgE). This response leads to the release of inflammatory chemicals, such as histamine, which cause allergy symptoms.

what is allergies-Aallergies

Common allergens include:

1. Environmental allergens:
- Pollen from trees, grasses, and weeds
- Mold spores
- Dust mites
- Pet dander

2. Food allergens:
- Peanuts, tree nuts
- Eggs
- Milk
- Soy
- Wheat
- Fish and shellfish

3. Insect allergens:
- Bee venom
- Wasp venom

4. Other allergens:
- Latex
- Certain medications
- Household chemicals

Allergy symptoms can range from mild to severe. They may involve various parts of the body, including the respiratory system (sneezing, runny nose, itchy eyes), skin (hives, rashes, eczema), digestive system (vomiting, diarrhea), and in severe cases, anaphylaxis (a life-threatening whole-body allergic reaction).

The severity of allergic reactions can vary from person to person, and some individuals may be allergic to multiple allergens. Proper diagnosis and avoidance of allergens and medications (such as antihistamines, corticosteroids, or immunotherapy) can help manage and treat allergic conditions.

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