Which of the following is a symptom of a mild allergic reaction?

• A. Dizziness
• B. Nasal congestion
• C. Itching/burning
• D. Headache

Answer: (C)

Mild allergic reactions show symptoms from histamine release that affect skin and mucous membranes without compromising the airway. Itching or burning is a classic sign because histamine stimulates nerve endings in the skin, producing that itching sensation often with mild hives or localized irritation. Nasal congestion can occur with allergies too, but itching is more directly linked to the skin-related aspect of a mild reaction. Dizziness and headache are nonspecific and can come from many causes, so they don’t point to a mild allergic reaction by themselves. In first aid, identifying itching with potential accompanying rash or nasal symptoms helps you distinguish a mild reaction from more serious forms that threaten breathing or circulation, which would require urgent care.