What is a characteristic symptom of allergic rhinitis?

A characteristic symptom of allergic rhinitis is nasal congestion. This condition occurs when the immune system overreacts to allergens such as pollen, dust, pet dander, or mold, leading to inflammation in the nasal passages. Consequently, this inflammation can obstruct airflow, resulting in congestion. Additionally, allergic rhinitis often presents with other symptoms such as sneezing, runny nose, and itchy eyes, which further emphasize the nasal involvement.

The other options do not align with the typical presentation of allergic rhinitis. Ear discharge is more commonly associated with ear infections or Eustachian tube dysfunction. Fever is usually indicative of an infection rather than an allergic reaction. Painful swallowing is more relevant to throat conditions or infections rather than allergic rhinitis. Hence, nasal congestion stands out as a primary and characteristic symptom of this allergic condition.