Child marriage is a deeply rooted social issue with devastating health consequences, especially in countries like Nigeria where it remains prevalent. One of the most severe and direct health outcomes associated with child marriage is obstetric fistula, a childbirth injury resulting from prolonged or obstructed labor without adequate medical care. Nigeria unfortunately holds the highest number of obstetric fistula cases worldwide, largely due to the significant number of young girls forced into early marriages. Millions of girls affected by child marriage face not only psychological and social challenges but also increased risks to their physical health. Obstetric fistula develops when young girls, whose bodies are not fully developed for childbirth, endure prolonged labor that causes tissue damage between the vagina and bladder or rectum. This injury leads to incontinence and chronic infections, often leaving the girls socially isolated due to stigma. Addressing child marriage is therefore critical in preventing obstetric fistula. Efforts to end child marriage focus on increasing education, especially for girls, raising awareness about the health risks, and enforcing legal frameworks that prohibit marriage under the age of 18. Healthcare access improvements are also essential to providing timely emergency obstetric care. Beyond medical intervention, community engagement and changing cultural attitudes toward child marriage are vital. Empowering girls through education and economic opportunities helps them avoid early marriage and build healthier futures. Organizations working in Nigeria and globally strive to collaborate with communities, governments, and healthcare providers to break the cycle of child marriage and its associated health complications. Ending child marriage is not only a protective measure for girls’ health but a human rights imperative. By increasing understanding and taking collective action, we can reduce the incidence of obstetric fistula and support millions of girls to live healthier, dignified lives free from early marriage burdens.