Entrepreneur Seeby Woodhouse was admitted to hospital yesterday and says one side of his face is paralysed.
The high-profile businessman, in his late 30s, posted to Facebook yesterday about his health issues.
Woodhouse said during a recent visit to his doctor for a fever and "hideously nasty snotty nose" he discovered his blood pressure was "astronomically high".
"And that it's more likely to be as a result of heart damage from years of partying, rather than fever, so I became scared and worried that I literally may drop dead someday soon," he posted.
"Then: after the nose infection got into my ear, I have totally lost all hearing in one ear, and I was miserable about that as it could mean permanent deafness in that ear... this morning the infection / nerve damage has spread to the whole left hand side of my face so that my face is paralyzed and I can't smile or eat properly," he said.
"So: sitting here being admitted to hospital on a Sunday with a dodgy ticker, potentially permanently totally deaf left ear and facial paralysis, I had to laugh at my situation as I finally got the message," he said on the social media site.
Woodhouse said he is now choosing to find things to be happy about, including that he has access to world class health care and the money to pay for it.
"And...half a smile is better than none," he said.
"If my hearing and face problems get better and my comprehensive heart tests turn out ok in a week or so, then I'm going to be so ecstatically happy it'll be ridiculous," Woodhouse said.
He went on to post that "the staff at auckland hospital have been so, so amazing - but sorry so say that hospital food is still hospital food and tastes as bland as a double washed cabbage".
Woodhouse made almost $25 million selling Orcon in 2007 and went on to set up another internet provider, Voyager.
He split up from his wife of one year, Geraldine Burnett, in January.