What is the primary symptom of allergic conjunctivitis?

What is the primary symptom of allergic conjunctivitis?

• A. Itching
• B. Redness
• C. Purulent discharge
• D. Pain

Answer: (A)

Allergic conjunctivitis is driven by an IgE-mediated reaction to allergens, which triggers histamine release in the conjunctiva. This histamine stimulates sensory nerves, producing a pronounced itching sensation that is the most characteristic and prominent symptom of the condition. Redness and tearing often accompany it due to inflammation, but itching is the standout feature that helps distinguish allergic conjunctivitis from other causes. Purulent discharge points toward bacterial infection rather than allergy, and pain is not typical unless there is involvement of the cornea or a more serious complication.

Allergic conjunctivitis is driven by an IgE-mediated reaction to allergens, which triggers histamine release in the conjunctiva. This histamine stimulates sensory nerves, producing a pronounced itching sensation that is the most characteristic and prominent symptom of the condition. Redness and tearing often accompany it due to inflammation, but itching is the standout feature that helps distinguish allergic conjunctivitis from other causes. Purulent discharge points toward bacterial infection rather than allergy, and pain is not typical unless there is involvement of the cornea or a more serious complication.