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According to NHS, anaphylaxis is a severe and potentially life-threatening reaction to a trigger such as an allergy.
Symptoms of anaphylaxis
Anaphylaxis usually develops suddenly and gets worse very quickly.
The symptoms include:
1. feeling lightheaded or faint
2. breathing difficulties, such as fast, shallow breathing
3. wheezing
4. a fast heartbeat
5. clammy skin
6. confusion and anxiety
7. collapsing or losing consciousness.
There may also be other allergy symptoms, including an itchy, raised rash (hives); feeling or being sick; swelling (angioedema) or stomach pain.
What to do if someone has anaphylaxis
Anaphylaxis is a medical emergency. It can be very serious if not treated quickly.
If someone has symptoms of anaphylaxis:
1. Use an adrenaline auto-injector if the person has one, but make sure you know how to use it correctly first.
2. Call emergency number for an ambulance immediately (even if they start to feel better), mention that you think the person has anaphylaxis.
3. Remove any trigger if possible, for example, carefully remove any stinger stuck in the skin.
4. Lie the person down and raise their legs, unless they’re having breathing difficulties and need to sit up to help them breathe. If they’re pregnant, lie them down on their left side.
5. Give another injection after 5 minutes if the symptoms do not improve and a second auto-injector is available.
Triggers of anaphylaxis
Anaphylaxis is the result of the immune system, the body’s natural defence system, overreacting to a trigger.
This is often something you’re allergic to, but not always.
Common anaphylaxis triggers include:
1. foods: including nuts, milk, fish, shellfish, eggs and some fruits
2. medicines: including some antibiotics and non-steroidal anti-inflammatory drugs (NSAIDs) like aspirin
3. insect stings: particularly wasp and bee stings
4. general anaesthetic
5. contrast agents: dyes used in some medical tests to help certain areas of your body show up better on scans
6. latex: a type of rubber found in some rubber gloves and condoms.
In some cases, there’s no obvious trigger. This is known as idiopathic anaphylaxis.
Preventing anaphylaxis
If you have a serious allergy or have experienced anaphylaxis before, it’s important to try to prevent future episodes.
The following can help reduce your risk:
1. identify any triggers: you may be referred to an allergy clinic for allergy tests to check for anything that could trigger anaphylaxis
2. avoid triggers whenever possible: for example, be careful when food shopping or eating out if you have a food allergy
3. carry 2 in-date adrenaline auto-injectors at all times: give yourself an injection whenever you think you may be experiencing anaphylaxis, even if you’re not completely sure.
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