Max George has had "a rough day" in hospital

Speaking in a new video posted to Instagram, he said: "I've had a bit of a rough day today.

"My heart rate dropped this morning, which was a little bit scary. But everyone here's amazing and they managed to get it back up a little bit and get it stable again, which is great.

"A lot of friends and family are asking why I'm not just going in and having anything done yet, but there's so many tests that need to be done before we do anything."

"I just need to get through to next week and have all the tests done, then they'll know exactly what to do."

The 'Glad You Came' hitmaker concluded his message by noting that he is determined to stay positive amid the ordeal.

He said: "Obviously they'll be able to do something but it'll be better doing it with all the information they need. But year, it's s**** But still here and staying positive."

In his initial post to Instagram, Max - who is currently dating former soap actress Maisie Smith - revealed that he will be spending Christmas in hospital.

He wrote on Instagram: "Yesterday I felt really unwell and was taken in to hospital. Unfortunately after some tests they've found that I have some issues with my heart.

"I have a lot more tests to determine the extent of the problems and what surgery I will need to get me back on my feet.

"It's gonna be a difficult few weeks / months... and Christmas in a hospital bed wasn't exactly what I had planned!

"But, as always, I'm surrounded with love and support from my wonderful partner Maisie, her family, my family and friends.. and I'm 100% in the best place.

"Although this is a huge shock and no doubt a set back, it's something I'll take on with all I've got! I count myself very lucky that this was caught when it was.

"Apologies if I bore you with updates in the coming weeks.I've probably got a month in a bed and there's not THAT much to do!"