If you suspect you have allergies – to foods, dust, pollen, or pet dander – your doctor may suggest skin tests as part of the evaluation. Knowing what to expect makes the process less intimidating.
In a typical skin prick test, tiny drops of allergen extracts are placed on your forearm or back. The skin under each drop is then lightly pricked or scratched so the substance enters the very top layer. It’s more of a tickle or mild sting than a deep injection.
After about 15–20 minutes, the healthcare provider checks for reactions. A positive reaction usually looks like a small, raised, itchy bump (similar to a mosquito bite) where the allergen was placed. The size and pattern of these bumps, combined with your history, help the doctor understand what might be triggering your symptoms.
You may be asked to avoid certain medicines, especially antihistamines, before the test because they can interfere with the results. Always follow the instructions you’re given.
Skin tests aren’t perfect and are interpreted along with your story. A positive test doesn’t always mean a severe allergy, and a negative test doesn’t rule out every possibility. But they’re a helpful starting point for a logical plan, instead of guessing based on fear.