The sporting world has been providing reaction to Trott's plight on the social networking site Twitter all morning and below Sports Mole has selected some of the posts.
"Hope Trotty is ok. The Ashes are important but there are bigger things in life than just cricket. Hope he is back well soon."
England international Luke Wright
"Sad news, hope trotty is ok. Let's not start pointing to many fingers at the reason why and how, let's just think about the man in the mist of it all."
Former England international Marcus Trescothick
"I wish Jonathan Trott a speedy recovery from a tough situation, a safe flight home to be with family!"
Australia coach Darren Lehmann
"Best wishes and positive thoughts to Trotty in fighting the illness."
The Barmy Army's official Twitter page
"Feeling for Jonathan Trott. I hope he and his family are left alone by all media & he's able to recover quickly & return to the Eng team!"
Former Australian spin-bowler Shane Warne
"Cricket is important but your health is your life. Hope Trotty recovers enough to get back to the top #trott #ashes."
Former England international Paul Collingwood
"Hope Trott is ok and back soon. Test Cricket is tough and we are going to see a major Ashes battle in the next few months."
Former England and Manchester United footballer Gary Neville
"Wishing Jonathon trott the best. Cricket not that important. Hope you can find some relaxation away from it all."
Former Australian cricketer and now commentator Ian Healy
"Thoughts go out to Jonathan Trott in a very tough time, hope he is able to recover quickly and return to the Eng set up."
Former England bowler Phil Tufnell
"I do feel guilty for criticising Trott this week. I wasn't to know what he was going through and I can only comment on what I see."
Former England captain Michael Vaughan
"Very confused why England took Trott to Australia when he's had a health problem. Lets hope he's ok."
Former Germany and Liverpool footballer Dietmar Hamann
"I admire Trott for his courage asking for help! best of luck to him!
Former Australian cricketer Dean Jones