was machen bei allergischer reaktion — what does this mean exactly?

The phrase 'was machen bei allergischer Reaktion' translates to 'what to do in case of an allergic reaction' and asks for first-aid steps. For mild symptoms like sneezing, itching, or hives, antihistamines (e.g., cetirizine) and topical corticosteroids can be used. For severe reactions with difficulty breathing, facial/throat swelling, or collapse (anaphylaxis), call emergency services (911/112) immediately and administer an epinephrine auto-injector (e.g., EpiPen) if available. Crucially, consumer tests like MyBody-X (DNA, microbiome, IgG) cannot diagnose allergies or guide acute treatment. This advice is based on standard medical practice, not on the provided context. When in doubt, consult a doctor.