Cold vs Allergies: How to Tell the Difference
Colds and allergies can feel almost identical — runny nose, congestion, sneezing — but they're caused by very different things. Here's how to tell them apart.
Quick comparison
| Cold | Allergies | |
|---|---|---|
| Cause | Virus | Immune reaction to allergens |
| Duration | 7–10 days | Weeks to months while exposed |
| Fever | Sometimes | Never |
| Itchy eyes | Rare | Common |
| Body aches | Common | Rare |
| Seasonal pattern | Anytime | Often spring/fall |
Key differences
- Allergies don't cause fevers; colds sometimes do.
- Itchy eyes, ears, and throat point strongly toward allergies.
- Symptoms lasting more than two weeks are usually not a cold.
Common symptoms
CongestionSneezingRunny noseCough
When to seek help
- Symptoms last longer than 10 days.
- Symptoms return at the same time each year.
- Over-the-counter remedies don't help.
FAQ
Can allergies turn into a cold?+
No — they have different causes, but uncontrolled allergies can weaken your defenses.
Why do my allergies feel like a cold every spring?+
Spring pollens in Arizona can trigger sudden, intense allergy symptoms that mimic a cold.