The intradermal test is one of the tests performed to detect the substance or allergen to which a patient has an allergic reaction. Usually it has done when testing skin puncture is negative but is still suspected the possibility of being allergic to a particular allergen. The intradermal test involves injecting small amounts of the substances or allergens under the skin of the patient. The results can be obtained in a period of between 10 and 30 minutes, checking if clear symptoms that confirm an allergic reaction in the form of small hive with swelling and redness occurs. This test typically provide convincing and reliable results.