mental health 是生活中通常用來指“心理健康”和醫學意義上的“精神方面健康”。比如 He is mentally strong/healthy. 意思是他有健康的生活意識，意誌堅強等。而 He is mentally ill 則可能指他有精神疾病。
psychological health 是心理醫學名詞，也包括上面的內容，但生活中卻不常用。人們聽到這個詞時會有“咬文嚼字”的感覺。但它傳遞的信息和 mental health 並沒有什麽不同。正式文件裏這個詞組出現的機率恐怕會高壹些。例：
Championed by the Mental Health Commission of Canada (MHCC), and developed by the Canadian Standards Association (CSA Group) and the Bureau de normalisation du Québec (BNQ), the Standard is a voluntary set of guidelines, tools and resources focused on promoting employees’ psychological health and preventing psychological harm due to workplace factors.