If you're not allergic to pollen, dust, ragweed, etc...basically no allergies.....tested and negative, can you still have rhinitis? what causes it?

VASOMOTOR RHINITIS: Yes you can and the condition is called vasomotor rhinitis, the real cause why it happens and the mechanism is not well understood.But it ca be caused by dry atmosphere, air pollution, eating spicy foods, alcohol, and several medications.It can be a year long problem as compared to allergic rhinitis which is seasonal most of the time.

Yes.: The cause of about 1/3 adult patients with chronic rhinitis is not allergic. For these patients triggers include irritants like smoke, perfume, petrochemical odors, diesel exhaust, wind & cold air. Topical antihsitamine & anticholinergic sprays are effective meds. Nasal polyps, chronic sinusitis, & hypothyroidism are other common causes of chronic rhinitis.

Yes: You may have a form of non-allergic rhinitis. This includes many different causes like having "irritant reactions" to smoke, dust, strong smells, cleaning products, changes in temp and humidity. Other non-allergic causes include problems with hormones (eg thyroid, low testosterone, etc), atrophic rhinitis, cerebrospinal fluid rhinitis (from trauma, sinus surgery, etc), among others.