How do I tell my parents that I’m very sick?

How do I tell my parents that I'm very sick?

From a female blog reader:

Am suffering of a heart problem and kept it from my family, reason being that my parents are facing serious economic problem and my dad has hipartention and am his favourite child (dad’s girl) now am seriously down and not buoyant enough to take care of my hospital bills, i had to call my dad to tell him am sick thinking he will say ok let him see if he can send something for me but instead he ask me to come back home as am not living in the same city with my parents.
i don’t know if to tell them the truth, because if i do am scared my father might fall ill and there is no money, i don’t want to add to my family’s problem. pls what should i do am on my way home now.