It’s a common misconception that allergies only appear during childhood — but that’s far from the truth. Many adults are surprised to learn they can develop new allergies later in life, even to things they’ve tolerated for years.

1. Why Do New Allergies Develop?

Allergies occur when your immune system mistakenly identifies a harmless substance — like pollen, dust, or certain foods — as a threat. While genetics play a role, factors like changes in your environment, hormone levels, or immune system health can also trigger adult-onset allergies.

2. Common Adult-Onset Allergies

  • Food allergies: Shellfish, nuts, and certain fruits are the most common.

  • Environmental allergies: Dust mites, mold, and pet dander may start causing symptoms even if you’ve had pets your whole life.

  • Seasonal allergies: Exposure to new regions or climates can introduce pollens your body hasn’t encountered before.

3. How to Know if It’s an Allergy

New symptoms like congestion, itchy eyes, hives, or stomach issues could signal an allergy. However, these can also overlap with other conditions. At Premier, we can pinpoint your exact triggers through testing.

4. Treatment Options

While adult-onset allergies can be frustrating, there are effective ways to manage them — from allergen immunotherapy (allergy shots) to targeted medications and avoidance strategies.