This paper looks at how Adverse Childhood Experiences (ACEs) and harmful parenting habits affect Nigerian children's psychological, social, and developmental health. It discusses the connection between the emergence of ACEs and harmful parenting behaviours (such as neglect, emotional and physical abuse, and overcontrol). The discourse uses Attachment Theory, Ecological Systems Theory, and Resilience Theory to examine the long-term effects of ACEs on children's mental and physical health. In order to lessen the consequences of ACEs, this discussion emphasises the value of counselling therapies, such as trauma-informed care, parental psychoeducation, and community-focused tactics. To minimize harmful parenting behaviours and lower the prevalence of ACEs in Nigeria, recommendations for policy changes, public awareness campaigns, professional development, and the creation of easily available support networks were suggested.