Conclusions Patients who have in-depth knowledge of their condition encounter problems when their expertise is seen as inappropriate in standard healthcare interactions, and expertise taught to patients in one branch of medicine can be considered non-compliant by those who are not specialists in that field. Although patient education can give people confidence in their own self-management skills, it cannot solve the power imbalance that remains when a generalist healthcare professional, however well meaning, blocks access to medication and supplies needed to manage chronic diseases successfully. There is a role for those involved in primary and hospital care, including those supporting and training healthcare professionals, to recognise these problems and find ways to acknowledge and respect chronic patients’ biomedical and practical expertise.