Choose carefully Patients with allergies go to the hospital, the doctor makes a diagnosis, and the patient often asks what is causing the disease. Can we have a lab test? My answer is that as long as your financial conditions allow you to do as you please, for reference only, you can not take the test results to guide your life (except for the patch test, which is an allergen test method), in life to find the most accurate allergens, and has practical significance.