The band are currently in the midst of their massively successful Wild Dreams tour, which has seen them travelling the globe, from Ireland to Indonesia.
In a recent statement to Instagram Mark explained that he would not be able to join Shane, Kian and Nicky on stage for the remaining five shows.
However, he has made sure to keep fans updated along the way.
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Just earlier this week, he thanked his fellow bandmates for their “love and support”.
While today, Mark shared an update of himself, live from the hospital where he can be seen lying in bed.
“Hey all! Just saying ‘hi’ and thanks for all the lovely messages!
“All is well, I’ll be home soon,” he added.
Fans, friends and family alike were quick to share their well wishes with the singer with one commenting: “We love you Mark! Get well soon!”
While another wrote: “Glad to Know you’re well and recovering. Can’t wait to have you back in top shape.”
This isn’t the first time Mark has experienced health complications while touring.
During the 2022 leg of their Wild Dreams tour, the father-of-one, unfortunately, caught pneumonia in November and missed some of their gigs while he recovered.
We wish him a speedy recovery!