IgE is a secretory immunoglobulin, and the amount of IgE synthesis indicates that the body may have an allergic disease. lgE testing criteria are classified as grade 0 (<0.35 kU/L), grade 1 (≥0.35 kU/L and <0.7 kU/L), grade 2 (≥0.7 kU/L and <3.5 kU/L) , grade 3 (≥3.5 kU/L and <17.5 kU/L), grade 4 (≥17.5 kU/L and <50 kU/L), grade 5 (≥50 kU/L and <100 kU/L), and grade 6 (≥100 kU/L), after the data in the CAP testing system showed that this evaluation criterion has a high accuracy and specificity. An organism with IgE greater than 200 kU/L is due to a patient who is in the midst of an allergic disease, such as allergic urticaria, allergic rhinitis and allergic asthma. When the allergic symptoms are severe, antihistamines such as loratadine and levocetirizine hydrochloride should be used promptly under the guidance of a doctor for anti-sensitization treatment, and at the same time observe whether there are complications caused by allergy, such as Bronchial asthma, dermatitis, etc. Once they appear, they need to be treated for the complications, and glucocorticoids such as budesonide, beclomethasone propionate, dexamethasone, etc. can be used to relieve the symptoms. After the allergic symptoms are relieved, it is necessary to conduct an allergic substance screening and avoid contact with the substance again after the allergen is clarified, as well as to avoid eating foods that have been clearly identified as allergens.