Allergy skin tests check how the skin reacts to small amounts of substances that may cause an allergy. The test is chosen according to the symptoms and the suspected trigger. Different skin tests look for different kinds of reactions.
A skin-prick test puts drops on the skin and makes a small prick through each drop. An intradermal test injects a small amount into the skin and is used for selected allergies. These tests look for reactions that develop quickly. Patch tests leave substances against the skin to check for delayed contact reactions, such as reactions to a metal or a skin-care ingredient.
A reaction shows that the skin responded to the tested substance. It does not always mean that the substance causes symptoms in everyday life. The clinician compares the result with the symptoms and when they occur.
Yes. Some medicines, including antihistamines used for allergies, can affect certain skin tests. The testing team will explain whether any medicine needs to be paused and for how long. Do not stop a prescribed medicine on your own.

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