I would tell all of my friends to send me a lot of positive energy and support my self-healing process, if I would want to get healed. I would not necessarily tell to all of them what is my health problem, but I would ask for energy support. I would also do my best to find needed natural ways that would help me to heal mentioned disease, at the first place, and I would do it in my privacy .
I would say nothing to that ones who are sceptics, who tend to panic or are negative or afraid of difficult diseases.
Ill person requires emotional support from dearest ones in order to heal, not negativity, sadness or pitying, by my opinion.