This Article defends the relevance of the distinction between physical and emotional harm, especially in tort law, by offering theoretical justifications that are responsive to the modern criticisms. A new conception of the distinction should be based on a duty to reasonably regulate one’s own emotional health. This duty fits well within tort theories including law and economics, corrective justice, and civil recourse theory, and harmonizes with criminal law and First Amendment doctrines. Further, neuroscience, social science, and even feminist theory support this duty. A duty to maintain one’s own emotional well being can benefit both potential tort plaintiffs and defendants by incorporating normative ideals about identity, consent, autonomy, social justice, and social welfare. In advancing this emotional duty, this Article also provides sustainable definitions for physical and emotional harm that can survive changing technology and discusses the implications of a new understanding of the physical/emotional hierarchy for tort law.