What reason for skeen elergy?

Skin test?: I believe what you meant was "skin" test in allergy, we use the skin test to find out whether a person has acquired an antibody (called ige) against certain allergens often selected based on your geographic locale, history etc. A positive response would confirm the diagnosis in question. Indications for skin test include hay fever , itchy eyes, food allergies, and bronchial asthma.