A person is suffering from the Pahdiatop allergy when he/she is allergic to the different inhalants such a dust or pollens. When you start to sneeze or feel a headache near the dust or other different inhalants, then you are suffering from the Atopic allergy. In such situations, the allergy can lead to the conditions like Asthma, Rhinitis, Urticaria and Eczematous dermatitis. Hence it is essential for you to know that if it is an allergic reaction or it is bacterial. The test is done using the blood or sometimes using the different inhalants. But the use of inhalants makes the patient uncomfortable and thus the IgE test of antibodies is more suited using the blood.