The aim of this review was to analyze the oral manifestations of COVID-19. A systematic literature review was carried out using the following databases: Cochrane Library, Embase, PubMed and Web of Science; this yielded 2497 articles, and 28 met the criteria for inclusion. The searches were carried out from October to December 2021. The articles show that oral alterations present as manifestations of mild cases of COVID-19, but that these can also occur in severe cases of the disease, due to the existence of several factors, increasing the risk of death. Thus, there are many explanations for the development of oral manifestations of COVID-19; they can be related to age, sex, comorbidities, among other factors. Conclusion: Although there is no clinical pattern of the disease, the most common manifestations in the literature are anosmia, dysgeusia, erosions, halitosis, ulcerations and xerostomia. Therefore, this emphasizes the importance of multidisciplinary understanding of the disease when analyzing and diagnosing the oral manifestations of COVID-19.