Nucleic acid throat sampling location for the pharyngeal isthmus, it is recommended to do the pharyngeal swab nucleic acid test is to relax, if the pharyngeal swab nucleic acid test after nausea, dry heaves and other symptoms of discomfort, usually do not need to deal with. If the patient performs the pharyngeal swab nucleic acid test, it can be dipped into the local mucosa on the left or right side of the pharynx. It is recommended that while performing the pharyngeal swab test, one needs to remain relaxed and take deep breaths if necessary. In addition, some people may experience nausea and dry heaving, irritating dry cough and other manifestations during the pharyngeal swab nucleic acid test, which is mostly considered to be caused by the irritation of the throat by the cotton swab, and generally does not require special treatment, and can be relieved on its own. Pharyngeal swab nucleic acid throat sampling site for the isthmus of the pharynx, it is recommended that the pharyngeal swab nucleic acid test need to leave the sampling site in a timely manner after the test, and to maintain a distance of 1 meter from the surrounding people, in the process of nucleic acid test need to wear a mask.