In the 20 years since the founding of the "Journal of Interpersonal Violence," there have been exciting new discoveries on the long-term physical health effects of family violence. As exciting as these discoveries have been, we still know little about why the experience of family violence makes people sick. Some of the most promising areas of study on this topic will be in neuroscience, sleep studies, and cognitive variables such as hostility. Once we understand mechanisms, we can design interventions that can ameliorate these effects.