Perennial non-allergic rhinitis is a type of chronic nasal inflammation that is not caused by an allergy. It is characterized by symptoms such as nasal congestion, runny nose, and sneezing that persist throughout the year. The exact cause of non-allergic rhinitis is not well understood, but it is thought to be related to factors such as changes in weather, exposure to irritants, hormonal changes, and stress.

Symptoms of non-allergic rhinitis may include:

1. Nasal congestion

2. Runny nose

3. Sneezing

4. Itching in the nose or throat

5. Postnasal drip

6. Coughing

7. Headache

Treatment for non-allergic rhinitis may include avoiding triggers, such as exposure to irritants and changes in weather, and the use of over-the-counter or prescription medications, such as decongestants, antihistamines, and nasal sprays. In some cases, allergy shots (immunotherapy) may be recommended. It is important to see a doctor if symptoms persist or interfere with daily activities, as they can be indicative of a more serious underlying condition.