ABSTRACT
This study has done a systematic review of drug therapy and assessment of the occurrence of dental and neurological problems in patients affected by covid-19. There are various reasons that can cause an infection in the tooth. One of the most common causes of tooth infection is root canal treatments you have had in the past. Unfortunately, bacteria grow in this area and can lead to infection. Having an infection in the tooth can be very dangerous. Because it may spread to other parts of the body and cause serious problems. For this reason, it is very important to recognize the symptoms of infection. When a crack or cavity is formed on the tooth, if not treated in time, an infection may occur in the tooth. Because these are the gates that can pave the way for bacteria to enter your teeth. The most common type of disease is accompanied by episodes of severe pain that may be felt in the eyes, ears, lips, nose, forehead, cheeks, teeth or jaws, or anywhere on the face. The similarity of the symptoms of this complication with the symptoms of common dental diseases is a factor in misdiagnosis. This can lead to a series of unnecessary dental treatments that not only won't solve the problem, but may actually make it worse. Some patients undergo dental treatment at least once before the diagnosis of the disease. 1.