Angio-oedema is a sub type of urticaria.. It often appears in the face, lips and eyelids. It happens suddenly, causing swelling of the mucous membranes in the throat and larynx, creating a feeling of suffocation. The causes of angio-oedema are the same as for urticaria.
Anaphylactic shock can be a life threatening allergic reaction: It occurs suddenly in all of the body's tissues.Attacks can develop in exceptional cases into a severe condition and very rarely be fatal.
- Anaphylactic shock begins with general itching followed by urticaral `hive' type rash, which gradually extends over the entire body.
- Then comes Angio-oedema where deeper tisseus are affected like the throat. Shortness of breath (like acute asthma), caused by airway narrowing quickly follows.
- Nausea and abdominal pain generally follows the above symptoms.
- Within a few minutes, the arterial blood pressure falls, the heart rate accelerates and faintness can occur. The allergens usually responsible for an anaphylactic reaction are: medicines, anaesthetics, latex, wasp or bee stings or food.
Anaphylactic shock requires urgent medical treatment as adrenalin needs to be injected. Adrenalin has the opposite effect on the inflammatory mediators released during this acute reaction.<gras
It is essential to carry out a full and thorough allergic assessment immediately after anaphylactic shock. It is important to find the allergen responsible, so the appropriate avoidance measures can be taken and life long, life saving medication such as adrenalin injection pens, steroids and antihistamines can be carried around at all times in case of emergency.
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