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What Causes Sneezing from Allergies?

One of the most common (and annoying) symptoms of allergies is sneezing. Allergens can make you sneeze once, twice or even repeatedly. Here’s why:

1. The Start

You know that feeling, when your nose starts to twitch? That’s the start of a sneeze.

2. The Cause

Your immune system detects and reacts to allergens in the air that are usually harmless.

3. The Reaction

As soon as you come into contact with the allergens, your immune cells release a chemical called histamine.

4. The Build Up

When your body reacts to the histamine, your nasal passages swell up, and your nose and throat become itchy.

5. The Sneeze

This is when your brain tells the muscles in your chest to contract. Your eyes and soft palate close, and you sneeze.