Janet Winston’s bill from Stanford Health Care for allergy skin-patch testing was over $48,000. Winston, pictured at her home in Eureka, Calif., did extensive research to contest her bill and ...

Allergy tests can help identify the source of an allergic reaction. This is especially important if someone experiences severe or repeated allergic reactions. Allergic reactions have a variety of ...

A RAST test or radioallergosorbent test is a way of testing a person’s blood to see if they have any allergies. This test checks their blood for specific lgE antibodies to find out what substances ...

In the event of an allergic reaction, a range of tests are available to determine which substance is the primary cause. Various combinations of skin, blood, and/or challenge tests may be used, ...

An allergy happens when your immune system mistakes a normal, harmless substance for something that can cause illness. Your body then has an allergic reaction to this harmless substance—called an ...