Nucleic acid currently generally refers to the new crown nucleic acid test, may be damaged throat or other disease causes. 1. Pharyngeal damage: New Crown Nucleic Acid Test has pharyngeal swabs and nasal swabs. In the case of pharyngeal swabs, it is necessary to scratch the surface of the mucous membrane of the pharynx several times, which may lead to damage of the mucous membrane of the pharynx and symptoms such as sore throat, redness and swelling of the throat, etc., if the subject’s pharynx is more sensitive. In most cases, no special treatment is usually needed and the symptoms will be relieved by themselves. 2. Pharyngeal diseases: If the patient is suffering from chronic pharyngitis, tonsillitis, laryngitis and other diseases, when doing the throat swab nucleic acid test, it may be stimulated, leading to the recurrence of the disease and the phenomenon of sore throat. If the condition is mild, it can usually recover on its own. If the condition is serious, it is important to seek medical treatment for the condition. If the sore throat is not relieved for a long period of time after the nucleic acid test or is accompanied by other symptoms, it is recommended to seek medical attention promptly.