NREM (Non-Rapid Eye Movement) sleep is necessary for normal physical and intellectual performance and behavior. NREM parasomnias are defined as conditions where different symptomologies are associated with various behaviors happening during NREM sleep. Moreover, the underlying mechanism and proper treatment of the various conditions are yet to be explored in the realm of NREM parasomnias. In this review article, we summarize the fundamental mechanisms underlying the NREM sleep parasomnias as well as portray an algorithm to treat those conditions. We also briefly discuss important studies associated with NREM parasomnias and their related advancements in the treatment.