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Angioedema (sudden swelling)
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In short
Angioedema is sudden swelling that's often caused by an allergic reaction.
Worth knowing3
Areas of the body commonly affected include: the face – particularly the lips, tongue and eyelids; the hands or feet; the genitals.
NHS websiteSometimes the throat can swell up, leading to breathing difficulties.
NHS websiteIf an allergic reaction has caused the swelling, you'll usually also have a raised, itchy rash (hives).
NHS website
What helps1
You may not need treatment for angioedema if the swelling is mild or it only affects a small area of your body.
NHS website
Get help right away if1
Call 911 if your lips, mouth, throat or tongue suddenly become swollen; you are breathing very fast or struggling to breathe; your throat feels tight or you are struggling to swallow; your skin, tongue or lips turn blue, grey or pale; you suddenly become very confused, drowsy or dizzy; or someone faints and cannot be woken up. These can be signs of a serious allergic reaction (anaphylaxis).
NHS website
See a provider if1
Get care soon if part of your body, such as your hands, feet or genitals, suddenly becomes swollen.
NHS website
Sources
Contains public sector information licensed under the Open Government Licence v3.0.
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