Nasal swab test. Swabbing the nasal mucosa is done for multiple reasons to test for allergy cells, infection or to look at the structure of the respiratory cells in the nasal cavity.
Runny nose. A nasal swab can tell the health care provider about why someone is having nasal congestion. It can differentiate between allergy and infection. When sent to a lab it can tell specific etiologies.
Diagnostic test. This test is often used for trying to determine what might be going on in the nose. 1. Infection 2. Allergy 3. Non-allergic nasal inflammation a doctor or nurse will swab the nose with a q-tip like stick and send the material obtained for testing to rule out one of the problems above.