What Are the First Signs of Angioedema?

Angioedema is deeper swelling in the skin or lining of the body. It may appear over minutes or hours and can feel tight, warm, tender, or firm rather than itchy. Swollen lips, puffy eyelids, facial swelling, or swelling on another area of skin may be the first visible change. Hives can occur alongside it, but angioedema can also happen without a surface rash.

The trigger may be an allergic reaction, a medicine, an infection, or an inherited tendency. The appearance alone cannot identify the cause, so note what happened before the swelling, including new foods, medicines, insect stings, or illness.

Stop and assess whether the swelling is changing quickly or involving your mouth, tongue, or throat. Avoid a suspected new trigger until a clinician has reviewed it, but do not stop a prescribed medicine without medical advice unless emergency services instruct you to do so. A clinician may recommend antihistamine treatment for some allergic patterns or another treatment based on the cause.

Take a clear photograph and record the time it began, affected areas, associated hives, breathing symptoms, and recent exposures. This information can help distinguish a single episode from a recurring pattern.

Call emergency services immediately for trouble breathing, throat tightness, a hoarse voice, difficulty swallowing, tongue swelling, faintness, confusion, or rapidly worsening swelling. These signs can indicate airway involvement or a severe allergic reaction. Do not wait to see whether the swelling settles.

Seek prompt medical assessment even when breathing is normal if swelling is extensive, recurrent, painful, accompanied by vomiting or dizziness, or follows a new medicine. Emergency advice is based on the symptoms present, not on how often angioedema occurs.

Ask what might have triggered the episode, whether you need an emergency action plan, which medicines are appropriate for future swelling, and whether a recurring pattern needs specialist assessment.