What causes allergies?
Allergies occur when your immune system overreacts to a substance that is harmless to most people. These substances are known as allergens and can include pollen, dust mites, mold, pet dander, and certain foods.
When you come into contact with an allergen, your immune system produces an antibody called immunoglobulin E (IgE). This triggers the release of histamine and other chemicals in your body, leading to allergy symptoms.
Symptoms of allergies
The symptoms of allergies can vary depending on the type of allergy you have. Common symptoms include sneezing, runny nose, itchy eyes, and skin rash. In more severe cases, allergies can cause difficulty breathing, swelling of the face and throat, and anaphylaxis, which is a life-threatening allergic reaction.
When do allergies start?
Allergies can start at any age, but they are more common in children. The first time you come into contact with an allergen, you may not have any symptoms. However, your immune system will produce IgE antibodies in response to the allergen. The next time you come into contact with the same allergen, your immune system will recognize it and release histamine, causing allergy symptoms.
Some allergies are seasonal, such as hay fever, which is caused by pollen from trees, grasses, and weeds. Hay fever typically starts in the spring and can last until fall. Other allergies, such as those to pet dander, dust mites, and mold, can occur year-round.
Conclusion:
In conclusion, allergies are a common problem that can cause a range of symptoms. They occur when your immune system overreacts to a harmless substance. Allergies can start at any age, and some are seasonal while others can occur year-round. If you think you have allergies, it is important to speak with your doctor for proper diagnosis and treatment.
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