Our Symptom checker provides clinical advice on what to do next based on your symptoms.
Anaphylaxis is very serious and can even be fatal. See here for the symptoms to look out for and what to do in an emergency.
How to use an adrenaline autoinjector
An adrenaline autoinjector can, in an emergency, save the life of someone who is having a severe allergic reaction (anaphylaxis). Learn how to use one here.
Trusted information about allergy types, as well as allergy testing, anaphylaxis, antihistamines and common related conditions such as asthma and hay fever.
Adrenaline (epinephrine) is a hormone that helps you react more quickly in a stressful situation. Adrenaline is also used as an emergency treatment for a severe allergic reaction (anaphylaxis). Learn more here.
Insect bites and stings
Most insect bites will clear up in a day or two, although some people can have severe allergic reactions (anaphylaxis). Learn more about insect bites and how to handle allergic reactions.
Allergic reactions to antibiotics
Some people have an allergic reaction to antibiotics. Learn about the symptoms and the difference between allergic reactions and side effects.
Allergies and hypersensitivities
An allergic reaction occurs when the immune system overreacts to a foreign substance that usually causes few or no problems in most people.
Exposure to nuts, even in very small amounts, is a common trigger for a severe allergic reaction. Find out more here about nut allergies and how they can be managed.
Penicillin is the name given to a widely-used group of antibiotic drugs. Penicillin can have side-effects, and some people suffer allergic reactions. Find out more here.
Bitten by a spider? Not sure what to do? This article explains the best first aid treatment depending on the type of spider involved.