What condition is characterized by a horizontal crease across the lower bridge of the nose?

The condition characterized by a horizontal crease across the lower bridge of the nose is commonly associated with allergic rhinitis. This crease, often referred to as an "allergic salute," occurs when individuals frequently rub or pinch their noses in response to itching, which is a typical symptom of allergic reactions. Such actions can lead to a permanent indentation on the nasal bridge, particularly in children who have ongoing allergic responses.

Allergic rhinitis itself is an inflammatory condition resulting from an allergic reaction to airborne substances, such as pollen, dust mites, or pet dander. When exposure to these allergens occurs, symptoms often include sneezing, nasal congestion, runny nose, and itching, which may cause individuals to resort to rubbing their noses. This behavior is reflected in the development of the characteristic crease.

The other conditions—nasal polyps, chronic sinusitis, and deviated septum—do not typically present with this specific physical sign, as they involve different pathophysiological mechanisms and symptoms. Nasal polyps might cause nasal obstruction and reduced sense of smell, but they do not lead to a crease on the nose. Chronic sinusitis primarily presents with facial pain, pressure, and nasal discharge rather than changes in the nasal structure itself. A deviated sept