In Nigeria, healthcare marketing challenges are increasing due to legislative acts that have made it extremely difficult to promote healthcare marketing. However, with the advent of social media, people can get health care services online. Notably, social media platforms are increasingly becoming vital for promoting health care in Nigeria. They serve as a link to hotlines, online forums, and other resources that individuals can use in healthcare marketing in an emergency. This study investigated the impact of using social media tools for the promotion of healthcare marketing in post-COVID-19 Nigeria. While Diffusion of Innovations Theory and Technology Acceptance Model (TAM) served as the theoretical framework, the descriptive qualitative research design was used as the research method. Document analysis was employed to examine and interpret data relating to social media and healthcare marketing. Findings reveal that social media plays a significant role in promoting healthcare marketing in Nigeria. The study recommends that, through social media, information and resources can be shared with people and used as support to promote healthcare marketing.