This study examined the influence of Television Public Service Announcements (PSAs) on health behaviour change, with particular attention to how televised health messages shape public awareness and influence everyday health practices. The study focused on the role of television as a persuasive communication tool used by governments and health organisations to promote preventive health behaviours such as hygiene practices, disease prevention, and responsible lifestyle choices. The study was anchored on Reinforcement Theory, which explains how repeated exposure to media messages can shape and strengthen behavioural patterns by associating desirable actions with positive outcomes. The research adopted the library research method involving systematic review and analysis of existing scholarly materials including books, journal articles, and credible publications on health communication and media influence. Through this approach, the study analysed previous empirical studies and theoretical perspectives to understand the relationship between televised health messages and audience behavioural responses. Findings from the reviewed literature revealed that television PSAs significantly contribute to public awareness and knowledge of health-related issues. However, the study also found that increased awareness does not always translate into actual behavioural change due to factors such as poverty, inadequate infrastructure, cultural beliefs, language barriers, and low public trust in message sources. Findings further indicated that PSAs become more effective when they reflect the social realities of audiences, employ relatable language, and utilise credible information sources. The study concluded that television PSAs remain important instruments for health communication, but their effectiveness in promoting lasting behaviour change depends on cultural relevance, source credibility, and the availability of supportive social and economic conditions that enable individuals to adopt recommended health practices. The study recommended that health communication campaigns should adopt culturally relevant messaging strategies, that governments and health agencies should provide enabling facilities that support promoted health behaviours, and that media organisations should prioritise credibility and trust in designing and disseminating health messages. Keywords: Behaviour Change, Health Communication, Public Service Announcements, Reinforcement Theory, Television.