Allergic reaction happens when the antibodies created by the immune system to fight off foreign substances so you don’t get sick, sometimes the system will identify a substance as harmful even though it isn’t.

These substances, or allergens, can be anything like food, medication or environments.

When your body comes in contact with these substances or allergens, it can cause mild symptoms like sneezing, watery eyes or skin irritation.

In some people allergies can cause a life-threatening condition called anaphylaxis. It’s a condition can cause shock, a sudden drop in blood pressure, and also difficulty in breathing. This can lead to respiratory failure and cardiac arrest.

Allergic reactions can vary from person to person and depend on the type of allergy.



Common body part of an allergic reaction

Parts of your body that will commonly react include your:

Digestive system
Airways
Nose
Skin
Mouth

Common symptoms

Take a look at the table below to see which symptoms commonly show up for which allergy.

sneezing and an itchy, runny or blocked nose (allergic rhinitis)
itchy, red, watering eyes (conjunctivitis)
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