What symptom is most closely associated with rhinitis?

Nasal congestion is the symptom most closely associated with rhinitis, which is an inflammation of the nasal mucosa. This condition often results from allergies or infections and leads to a variety of symptoms, with nasal congestion being particularly prominent. The inflammation and swelling of the nasal passages cause them to become blocked, making it difficult for air to flow freely and often resulting in the sensation of fullness or pressure in the sinuses.

The other symptoms listed do not have a direct correlation with rhinitis. Dry mouth may occur due to various reasons including medications or dehydration, but it is not a primary symptom of rhinitis. Shortness of breath can be associated with many respiratory conditions, including asthma, but it is not a defining symptom of rhinitis itself. Chest pain is typically related to issues within the cardiovascular or pulmonary systems and is also not characteristic of rhinitis. Therefore, nasal congestion stands out as the key symptom indicating this nasal condition.