As owner of a family practice and urgent care center, Dr. Kelly Eileen Moon offers comprehensive diagnostic and treatment services for patients of all ages. Dr. Kelly Moon also leads the practice’s allergy lab.
When determining what allergens affect a patient, doctors may perform either a skin test or a blood test. The most common skin test, the skin prick test, requires the physician to place a solution containing the allergen on the patient’s skin. The doctor then scratches or nicks the skin to allow the solution entrance. If the skin reacts with redness or itching within a standard 15-minute time period, the patient is likely allergic to the substance that the doctor has introduced. However, patients who ordinarily react to allergens with rash may undergo testing by skin patch, which places the allergen on the skin for one to three days.
In some cases, a physician injects the allergen directly into the skin. Known as intradermal testing, this method tends to be more sensitive than the skin prick test. For this reason, a doctor may attempt intradermal testing following a negative skin prick result if the allergen remains suspect. If the patient cannot undergo skin testing for any reason, a physician is likely to order a blood test that searches for antibodies that the body produces to combat a particular allergen.