Background:
     
     Post-traumatic stress disorder (PTSD) affects mental health in the long term and is often associated with past psychological trauma. This systematic review was conducted with a purpose to investigate the correlation between adverse childhood experiences (ACE), experiences of child maltreatment, and the occurrence of PTSD in adults over 18 years to optimize treatment guidelines accordingly.
   

Method:
     
     The review utilized articles searched on PubMed, Google Scholar, Scopus, and Cochrane. Inclusion criteria include original studies (RCTs, cross-sectional, and cohorts) involving adults over 18 years with PTSD with a history of ACE published during the last decade (2014 and 2025). This study was conducted according to preferred reported items in systematic reviews and meta-analysis (PRISMA) guidelines. A quality assessment of the included studies was conducted using Newcastle Ottawa scale for cohort studies and the axis scale for cross-sectional studies.
   

Results:
     
     Out of 356 articles, 169 were screened, of which 26 studies were included in this review. These studies discussed various forms of childhood maltreatment, including sexual abuse, physical abuse, traumatic events, and neglect from parents. Most of these studies indicate a direct correlation between childhood maltreatment and Adulthood PTSD.
   

Conclusion:
     
     A robust association exists between ACE and childhood maltreatment and the development of PTSD in adulthood. There is a need for more literature to study the effects of maltreatment and comorbid mental health conditions for policymaking to protect child mental health.