How can I be sure I have nasal allergies?

Like many people, you may find it difficult to tell whether your symptoms are caused by allergies or a cold.

You also need to remember that your runny or stuffy nose and other symptoms may not be caused by an allergy or even a cold at all. A number of other factors, such as irritants, infections, injuries, or deformities of the nose, can cause similar symptoms. Knowing what's causing your symptoms is important since treatment differs for different conditions. The right diagnosis and early treatment can also help prevent potentially serious complications from developing. These include nasal polyps, ear infections, sinusitis, and asthma.

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