I think this may be done; by looking at the patient's allergy bracelet, by looking at MAR, Also by asking the patient and lastly by looking at the front of the chart. Allergy or allergic diseases are a number of conditions caused by hypersensitivity of the immune system to something in the environment that usually causes little or no problem in most people. When treating a patient with allergic diseases it is important for the nurse to determine patient's history by using the above methods.