I'm planning to discuss my daughter's health problems with other family members, giving sensitive details, and asking for advice without telling my daughter I would do this first.
Why share your daughters information without her consent?
I thought it would be nice to get other perspectives on things.
If she does not want others to know, then you should not tell them. Let her tell them if she wants to, it is her information.
It's just my family and close friends.
It does not matter who it is. Your daughter trusted you enough to give you the information, you should keep it to yourself.