Make room for the other version
Ask what the other person understood before assuming that you are arguing about the same facts. For a message about how to apologize for ignoring a recovery boundary, use this factual base: name the missed care, privacy breach, exposure, comment, or accommodation and its practical effect.
Correct the record precisely
Correct only what you can support, acknowledge any real impact, and propose a practical way to prevent repetition. Correct what is still correctable and ask what support is useful rather than prescribing it. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Agree on a testable next step
Do not debate symptoms, disclose medical details, or make the person reassure you. For urgent symptoms, exposure risk, medication errors, or safeguarding concerns, contact the appropriate clinician or emergency service. Do not recruit an audience, publish private evidence, or turn a misunderstanding into a campaign about character.