What should you know about covid and angioedema?

Angioedema often appears as sudden swelling around the lips, eyelids, face, hands, feet or genital area. It may occur with hives, but hives are surface welts while angioedema affects deeper tissue. Viral illness can coincide with swelling, yet the timing alone cannot establish that COVID-19 caused it.

Other possibilities include a new medicine, an allergic reaction, or a non-allergic pathway. A clinician will consider recent infections, medicines, foods, insect stings, previous episodes and whether the swelling is itchy or painful.

Photograph the swelling if it changes quickly, record when it began, and list every recent medicine, supplement and over-the-counter product. Do not stop a prescribed medicine without medical advice, but contact the prescriber promptly if swelling began after a new dose.

A clinician may use an oral antihistamine when histamine is involved. Oral corticosteroid treatment may be considered in selected situations. These medicines are not interchangeable, and treatment depends on the pattern, severity and cause. Avoid adding medicines without checking for interactions or suitability.

Call emergency services immediately for swelling of the tongue, throat or mouth, trouble breathing, wheezing, voice change, difficulty swallowing, faintness or rapidly worsening symptoms. Do not wait for a rash to appear. Urgent assessment is also appropriate when swelling is severe, recurrent or accompanied by vomiting or marked weakness.

Ask whether the pattern fits angioedema, whether any medicine should be reviewed, what to do if swelling returns, and which symptoms mean you should use an emergency plan or attend hospital.