What condition is characterized by the child constantly rubbing their nose?

Allergic rhinitis is characterized by a range of symptoms that result from an allergic reaction to environmental allergens such as pollen, dust mites, or pet dander. One common behavior in children suffering from this condition is the frequent rubbing of the nose, often referred to as the "allergic salute." This behavior occurs due to itchiness caused by inflammation of the nasal membranes, leading children to seek relief by rubbing their noses.

In addition to this distinctive behavior, allergic rhinitis may present with other symptoms such as sneezing, nasal congestion, and clear nasal discharge. Rubbing the nose can also be a way for children to attempt to alleviate their discomfort from nasal itching—a hallmark symptom of allergies.

Contrastingly, while conditions like sinus infections and the common cold can involve nasal symptoms, they are less likely to cause the itchiness associated with allergic rhinitis. Children with nasal obstruction might experience difficulties breathing or feel congested, but they do not typically exhibit the habitual nose rubbing seen in allergic conditions.