Hives or a skin rash are often harmless, but when they appear with breathing problems, they may signal a life-threatening allergic reaction called anaphylaxis. Warning signs include shortness of breath, throat tightness, swelling of the face or tongue, dizziness, and a rapid heartbeat.
Common triggers include foods, medications, insect stings, latex, or other allergens. This reaction can escalate quickly and become dangerous within minutes.
If hives occur with any breathing difficulty, seek emergency help immediately and use an epinephrine injector if available—fast action can save a life.
