Write from facts rather than momentum
Pause long enough to remove accusations, assumptions, and details that belong to someone else. For a message about how to support someone managing diabetes, use this factual base: use the person's description, note the access barrier or practical need, and avoid guessing about severity.
Offer a proportionate next step
Match the size of the request to the relationship and to what the recipient can reasonably decide now. Ask which accommodation or form of help is useful and follow through without making it a favor. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Protect privacy on both sides
Do not demand medical proof in a personal relationship, offer cures, or frame disability as inspiration. Use qualified clinical or emergency care for urgent health concerns and the proper rights process for denied accommodations. Use the most private legitimate channel available and do not share the exchange to recruit support or pressure.