To avoid an allergic reaction, you need to know what you’re allergic to. Skin testing one way your doctor can check on what causes your symptoms.

These tests use extracts (a concentrated liquid form) of common allergens such as pollenmolddust mites, animal dander, and foods. Once those get in your skin, they could trigger a rash. Your skin will get irritated and may itch, like a mosquito bite.

That reaction is how the doctor can tell you’re allergic to something. When you have an allergy, your immune system will make antibodies and set off chemicals to fight off the trigger.

Author Nathalia P

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