Skin prick Testing(SPT) is one of the most commonly used diagnostic procedures in allergy, as it is simple, safe,cost effective, and delivers quick results. All skin prick tests must be based on a careful and detailed clinical history, as screening or random SPT may be highly inaccurate and misleading.
SPTs take about 15-20 minutes, and can be safely performed on children of any age, as long as they have not taken antihistamines for a few days prior.
A skin prick test involves introducing a very small amount of a suspected allergen into the surface layer of the skin, usually on the forearm. The skin is then observed for 15-20 minutes, and any resulting local reactions(lumps or wheals) are marked as potential allergic responses.