Background Ethical conflicts generate difficulties in daily clinical activity. Which methods of ethical advice are most frequently used to resolve them among Spanish doctors has not been studied. The objective of this study is to describe what methods hospital internal medicine physicians in Spain use to resolve their ethical doubts and which they consider most useful. Design A cross-sectional observational study was conducted through a voluntary and anonymous survey and distributed through an ad hoc platform of the Spanish Society of Internal Medicine. Measures We measured methods by which to resolve doubts, types of tools sought, frequency of consulting the Clinical Ethics Committees, and satisfaction with resolution of ethical issues. Results Of 261 internists surveyed, 86 per cent resolve their ethical doubts with assistance, the most frequently used method being consultation with colleagues (58.6 per cent), followed by using specific protocols or guides (11.8 per cent) and consultation with experts in bioethics (9.6 per cent). The most preferred tools are the creation of protocols (30.3 per cent) and the establishment of a consultant/expert in bioethics (27.8 per cent). Conclusions Internists in Spain usually seek assistance to resolve their ethical doubts. Consulting colleagues is the most frequently adopted method. The majority regard tools to resolve ethical conflicts as necessary, seeking above all protocols and consultants/experts in bioethics.