Eating lychee usually has no effect on doing nucleic acid. Nucleic acid testing is usually done by collecting throat secretions, nasal mucous membrane secretions and blood to determine whether you are infected with a virus, such as the New Crown Nucleic Acid Test and the Hepatitis B Virus Test. Usually lychee has no effect on viruses, so consuming lychee has no effect on the nucleic acid test. However, it is recommended to avoid eating half an hour before the new crown nucleic acid test because the test will cause irritation to the throat, which is prone to dry heaving, nausea and other uncomfortable symptoms. After the nucleic acid test is done, you should leave in time, do not stay in the test site, and go home in time to disinfect and wash your hands. In general, we should also pay attention to their own protection, avoid going to crowded places, go out and wear a good mask.