Introduction: When addressing the COVID-19 pandemic, one must also address its remnants, as well as the Long COVID-19 Syndrome, or just Long COVID-19, which addresses a group of symptoms common to COVID, but which persist even after the infectious picture has ended. The main symptoms are fatigue, dyspnea, joint and muscle pain, headaches, and brain fog. Other symptoms, such as arrhythmias, anxiety, and sleep disorders, have been described, but the cause of these sequelae and the reason for them are not known for certain. Methodology: This is a literature review based on the SciELO and PubMed data platforms. The search period was July 2023, meeting the inclusion criteria of articles from 2000 to 2023, in Portuguese and English, online, and in full text. The following health descriptors (DeCS) were used as strategies to better evaluate the texts: "Long COVID syndrome", "COVID" and "Post COVID syndrome".