I looked it up on Wikipedia, as far as I know he might have a case of Gator Aids, being that he is from New Orleans, Louisiana.
Wikipedia :
Retreat from public life[edit]
Simmons has not made any major public appearances since 2014 and stopped appearing in public altogether in February of that year. In March 2016, speculation began that he was being held hostage by his housekeeper.
[3][4] In response, on March 14, 2016, Simmons gave an audio interview on the
Today Show, denying the rumors.
[5] In November, the Slimmons fitness gym closed, without any public announcement from Simmons.
[21] In February 2017, the podcast
Missing Richard Simmons launched, investigating why Simmons left public life so suddenly.
[43]
In March 2017,
LAPD detectives visited Simmons's home to conduct a
welfare check, issuing a statement that Simmons is "perfectly fine" and that "right now he is doing what he wants to do and it is his business."
[44] On April 19, 2017, following a hospitalization for severe
indigestion, Simmons made his first public comment in over a year, posting on
Facebook a photo of himself and the message "I'm not 'missing', just a little under the weather".
[45] However, the picture that was included in the post was from as far back as 2013, leading to speculation that the person who posted the message might not actually have been Simmons.
[46][47][48]
I think he is in hiding because he bloated up and regressed to his previous condition of his younger years.