Mohammed Sarhan Alzahrani*
Adverse effects of vaccines are common, yet the reaction to vaccines widely varies between people. Moreover, adverse reactions might indicate the effectiveness of vaccines and that the immune system is responding.
In this study, we present unusual side effects of the Pfizer/BioN-Tech vaccine. The patient had severe continuous pain related to the lower left first molar after the second dose of the Pfizer/BioN-Tech vaccine. The symptoms typically resemble symptomatic apical periodontitis cases. The patient who develops such symptoms shortly after the COVID-19 vaccine without an apparent cause should be assured and kept under observation for one to two weeks. A tentative diagnosis and treatment plan should be considered in the follow-up visit.