Does anaphylaxis cause facial swelling?

During anaphylaxis, swelling can affect the eyelids, cheeks, lips, tongue, or mouth. It may begin with tingling, warmth, or a feeling of fullness before becoming more obvious. Hives, itching, wheezing, vomiting, light-headedness, or a sudden sense of throat tightness may accompany it.

Facial swelling can occur for reasons other than anaphylaxis, such as a local skin problem, dental infection, or another type of allergic reaction. Sudden swelling after a possible allergen exposure is especially concerning when there are breathing, voice, swallowing, or faintness symptoms.

If facial swelling occurs with signs of anaphylaxis, use a prescribed adrenaline auto-injector immediately and call local emergency services. Do not rely on an antihistamine alone when throat, breathing, or circulation symptoms are present. Avoid food or drink if swallowing is difficult.

While waiting for help, lie flat with legs raised if comfortable. Sit with legs outstretched if breathlessness makes lying flat difficult. Someone should stay with the person and monitor for changes in breathing or responsiveness.

Call emergency services now for swelling of the tongue or throat, trouble breathing, wheeze, a hoarse voice, difficulty swallowing, fainting, confusion, or rapidly worsening symptoms. Medical assessment is needed after suspected anaphylaxis even when the swelling improves following adrenaline.

Ask whether allergy testing or specialist referral is appropriate, what triggers to avoid, and whether you should carry adrenaline auto-injectors. Request training on device use and advice on informing family, school, or workplace contacts about your emergency plan.