About this condition
Angioedema is sudden swelling of deeper skin or mucous tissues. Swelling of the tongue or throat and any difficulty breathing or swallowing can become life-threatening and must be treated as an emergency.
What you should know
Angioedema can occur with hives or without any wheals. Some cases are allergy-related, while others have non-allergic mechanisms and can be associated with particular medicines or other conditions.
When to seek medical advice
Swelling may affect lips, eyelids, face, tongue and other sites. The timing, recurrence, accompanying hives, new medicines and family history can help a clinician decide on the likely mechanism.
Important distinctions
Angioedema does not always mean an allergy, and medications acting on different pathways may require different treatment approaches. Recurrent swelling without hives merits specialist evaluation when clinically indicated; no single laboratory test explains every case.
How assessment works
For non-emergency episodes, a clinician reviews the onset, duration, previous reactions and possible triggers, including drugs, food and insect stings. Targeted investigations may be advised after the immediate safety issues are addressed.
Management and limitations
Care depends on the cause and mechanism, not only on how swollen the tissue looks. People with previous episodes may need a personal prevention and emergency plan. Advice on a web page cannot substitute for acute airway assessment.
When emergency help is needed
If the tongue, mouth or throat suddenly swells, the voice changes, swallowing or breathing becomes difficult, or collapse occurs, call 103 or 112 at once. If you have a prescribed adrenaline auto-injector for anaphylaxis, follow your emergency plan while help is coming.
Related information
Urticaria (hives); Food allergy; Drug allergy; Allergy to insect bites and stings.
Signs and symptoms
Swelling may affect lips, eyelids, face, tongue and other sites. The timing, recurrence, accompanying hives, new medicines and family history can help a clinician decide on the likely mechanism.
Diagnosis and tests
For non-emergency episodes, a clinician reviews the onset, duration, previous reactions and possible triggers, including drugs, food and insect stings. Targeted investigations may be advised after the immediate safety issues are addressed.
Care and treatment approaches
Care depends on the cause and mechanism, not only on how swollen the tissue looks. People with previous episodes may need a personal prevention and emergency plan. Advice on a web page cannot substitute for acute airway assessment.
When to seek urgent care
If the tongue, mouth or throat suddenly swells, the voice changes, swallowing or breathing becomes difficult, or collapse occurs, call 103 or 112 at once. If you have a prescribed adrenaline auto-injector for anaphylaxis, follow your emergency plan while help is coming.
Frequently asked questions
Is angioedema always caused by an allergy?
No. Allergy-related and non-allergic mechanisms exist, and a medical assessment is needed to distinguish them.
Can angioedema occur without a rash?
Yes. Some forms occur without hives; this detail is important when investigating recurrent episodes.
Can I wait for an appointment if my tongue is swollen?
No. Tongue or throat swelling, trouble speaking, swallowing or breathing require immediate emergency help on 103 or 112.
Important information
A medical consultation is needed for diagnosis and treatment recommendations.
Self-treatment can be harmful to your health.
