From the data collected by the World Health Organization, the population affected by Post Traumatic Stress Disorder is measured at 12 million in America, especially after the outburst of COVID-19. A further outbreak of post-traumatic stress-related syndrome is achieving a large leap in the infected population. Hence, more and more studies about such disorders are being put into more and more attention in the field of abnormal Psychology. The revaluation of certain disorders had become a significant focus. This paper focused on the impact of post-traumatic stress disorder after traumatic events such as sexual harassment and in the post-COVID-19 period. It highlights the need to develop inclusive formulas beyond post-traumatic stress disorder to understand the psychological difficulties experienced by affected populations. It also explores the relationship between human cognition and physical dysfunction, including immune system disorders, structural changes in the brain, and memory trade-offs associated with post-traumatic stress disorder. The social aspects of PTSD are also discussed, highlighting its impact on individuals in different social contexts. Finally, popular interventions such as prolonged exposure, cognitive processing therapy, and trauma-centered cognitive behavioral therapy are mentioned. The limitations of current PTSD diagnoses are acknowledged. The limitation of the research is also apparent. The understanding of to what extent factors like cultural background and culture dimensions, under different macro environments, the influence is being less discussed and less easy to determine as well.