This narrative review aimed to elaborate on the potential epigenomic treatments for PD and AD. About 199 scientific articles written in English, which reported on novel epigenomic-based treatment for PD and AD, were selected for this review from the PubMed database. Full articles and relevant data were extracted. Treatments targeting DNA methylation or miRNAs appear to show promising outcomes for PD and AD. Moreover, the clustered regularly interspaced short palindromic repeats and associated protein 9 is a potential genome editing tool for deciphering and manipulating the genome for the treatment of PD and AD. CLICK TO REVIEW