Objectives: To investigate the oral symptoms of COVID-19 ’s “positive” group in Suining City after the comprehensive liberalization of epidemic prevention and control measures in China. To explore the related influencing factors of symptom differences and provide reference for the treatment of patients in the post-epidemic era. Methods: An online survey based on a random sample of 25 questions. Results: 1768 valid questionnaires were collected. The data showed that 363 people had oral problems after an infection with novel coronavirus. The oral problems after SARS‐CoV‐2 infection mainly focused on gingiva swelling or bleeding (38.57%), toothache (37.74%), bad breath (27.55%), oral ulcer (30.30%), abnormal taste (24.24%) and some infected people had a variety of oral symptoms. A small number of infected people also have other oral problems. The incidence of oral symptoms was significantly correlated with sex, age, educational level, place of residence, smoking, basic diseases, long-term saline gargle and vaccination of COVID-19 vaccine. In addition, the age, place of residence, smoking history, basic diseases, and vaccination also showed significant differences in prognosis. Conclusions: In the post-epidemic era, the most common oral problems are gingiva swelling or bleeding, toothache, bad breath, oral ulcer, and abnormal taste. And maintaining good living habits is the basis for promoting disease recovery and oral health.