Symptoms of an allergic reactionusually develop within a few minutes of being exposed to something you're allergic to, although occasionally they can develop gradually over a few hours.
Althoughallergic reactionscan be a nuisance and hamper your normal activities, most are mild. Very occasionally, a severe reaction called Anaphylaxis can occur.
Common symptoms of an allergic reaction include:
The symptoms vary depending on what you're allergic to and how you come into contact with it. For example, youmayhave a runny noseif exposed to pollen, developa rash if you have a skin allergy, or feel sickif you eat something you're allergic to.
See your GP if you or your child might have had an allergicreaction to something. They can help determine whether the symptoms are caused by an allergy or another condition. for information about what to do if it occurs.
Read all about allergies, including about the most common allergies, what the symptoms of an allergic reaction are, and what can be done to keep an allergy under control.
Read about the main symptoms of an allergic reaction, including sneezing, wheezing, itchy eyes and shortness of breath.
Read about the tests that may be carried out to diagnose an allergy, including skin prick testing and blood tests.