Background In Sweden, 20% of female patients have reported lifetime experiences of abuse in any health care setting. Corresponding prevalence among male patients is estimated to be 8%. Many patients report that they currently suffer from these experiences. Few empirical studies have been conducted to understand what contributes to the occurrence of abuse in health care. Objectives To understand what factors contribute to female patients’ experiences of abuse in health care. Design Constructivist grounded theory approach. Settings Women's clinic at a county hospital in the south of Sweden. Participants Twelve female patients who all had reported experiences of abuse in health care in an earlier questionnaire study. Methods In-depth interviews. Results The analysis resulted in the core category, the patient loses power struggles, building on four categories: the patient's vulnerability, the patient's competence, staff's use of domination techniques, and structural limitations. Participants described how their sensitivity and dependency could make them vulnerable to staff's domination techniques. The participants’ claim for power and the protection of their autonomy, through their competence as patients, could catalyze power struggles. Conclusions Central to the participants’ stories was that their experiences of abuse in health care were preceded by lost power struggles, mainly through staff's use of domination techniques. For staff it could be important to become aware of the existence and consequences of such domination techniques. The results indicate a need for a clinical climate in which patients are allowed to use their competence. / <p>Funding Agencies|Swedish Research Council|2009-2380|</p>