IgE value 100-200mg/L, whether it is serious needs to be judged in conjunction with the disease, and IgE value alone cannot determine whether it is serious. Immunoglobulin E, or IgE for short, is the least Ig in the serum and is a kind of cytophilic antibody, which is related to allergic reactions, parasitic infections and skin allergies. Normal values for IgE are in the range of 0.1-0.9 mg/L, and IgE 100-200 mg/L needs to be combined with a specific disease to determine the severity. If the patient has urticaria, it may lead to an increase in total serum IgE, which is generally not considered serious. If the patient has allergic asthma, the serum total IgE concentration can be increased, the patient may cough, cough sputum, asthma, dyspnea and other symptoms, with allergic asthma is a more serious disease, untreated will cause airway ventilation dysfunction, serious cases cause respiratory failure. Elevated IgE, you can go to the regular hospital for further examination, and then for the cause of the treatment.