Allergic Rhinitis is caused by allergens, which are usually harmless substances but trigger an allergic reaction in some people. People with rhinitis are prone to symptoms such as runny nose, sneezing, congestion and sinus pressure. Rhinitis can contribute to other problems such as asthma, sinus or ear conditions or trouble sleeping. Some people with rhinitis symptoms don’t suffer from allergies. The symptoms may be similar, but the causes are different.
Strong odors, pollution, smoke, medications and other chronic health conditions may also contribute to Non-Allergic Rhinitis.