Which symptom would most likely be categorized as 'rhinorrhea'?

The symptom categorized as 'rhinorrhea' refers specifically to a runny nose, which is characterized by the discharge of mucus from the nasal cavity. This discharge can often be clear, particularly in cases of allergies or viral infections. The presence of a runny nose is a common response to irritants or infections and is essential in understanding various medical conditions, particularly respiratory ailments.

In this context, the other symptoms, such as an itchy throat, painful sinus pressure, and chest tightness, are associated with different conditions or responses within the respiratory system or other systems. Itchy throat typically indicates irritation or an allergic reaction, while painful sinus pressure is often linked to sinusitis or nasal congestion. Chest tightness may be indicative of respiratory or cardiovascular issues, but does not relate directly to the symptoms of rhinorrhea. Thus, the clear discharge associated with a runny nose is accurately classified as rhinorrhea.