At present, it is often said to do nucleic acid refers to the new coronavirus nucleic acid test, eating oranges before doing nucleic acid has no effect on the test results, but it is not recommended to eat too much two hours before the nucleic acid test to prevent nausea and other uncomfortable symptoms before the test. During the nucleic acid test, pharyngeal swabs and nasal swabs are usually performed, and eating does not adversely affect the accuracy of the test results, so there is no need to worry. However, it is generally not recommended to eat too much food within two hours before the nucleic acid test. The test may cause irritation to the mucous membranes in the throat area, and if too much food is eaten, patients may experience nausea and vomiting. Patients who need to undergo nucleic acid testing should be aware that they need to wear a mask throughout the test to prevent the spread of the new coronavirus through the respiratory tract. They should also leave the sampling site promptly after the test and should not stay at the sampling site for an excessively long period of time.