was tun bei einer allergischen reaktion — what symptoms are typical?

Typical allergic reaction symptoms range from mild (rash, hives, itching, sneezing, watery eyes) to severe (swelling of face/throat, difficulty breathing, drop in blood pressure, anaphylaxis). What to do? For mild symptoms: oral antihistamines (e.g., cetirizine) and topical corticosteroids; for breathing trouble or collapse: call emergency immediately (epinephrine auto-injector if available). Key: avoid trigger, see an allergist for testing. The provided context lacks specific allergy data – this answer relies on standard medical practice. Evidence: practice (clinical guidelines). Caveat: if symptoms are severe or recurrent, seek professional diagnosis; consumer DNA tests for allergies have limited predictive value.