Fans rushed to support him after he shared a lengthy statement.
Speaking to The Sun, Niall confirmed that he speaks to Lewis almost every day and supports his friend in his decision.
“I’m really happy for Lewis that he’s able to take the time that he obviously feels he needs right now,” he told the publication.
He went on to say that “performing never gets easy” and that the stage can be a “tough place” if you have any”performance anxieties”.
He also took the opportunity to praise the audience members at Glastonbury who supported Lewis on stage.
“He’s not just the fella who sings and makes us laugh all the time, he’s the fella who also has anxieties and Tourette’s Syndrome and it’s coming to fruition on stage,” Niall explained.
After performing his song Bruises at the iconic festival, Lewis admitted he was having voice issues saying: “I’m going to be honest everybody but I’m starting to lose my voice up here, but we’re going to keep going and we’re going to go until the end.
“I just need you all to sing with me as loud as you can if that’s okay?”
He apologised to the crowd as well as the festival organisers but the crowd cheered him on,
This week, Lewis issued a personal statement where he apologised to his fans for having to step away from touring.
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“First of all, thank you to Glastonbury for having me, for singing along when I needed it and for all the amazing messages afterwards,” he wrote.
Having recently just taken three weeks off to focus on his wellbeing, the singer sadly revealed that it wasn’t enough time.
“The truth is I’m still learning to adjust to the impact of my Tourette’s and on Saturday it became obvious that I need to spend much more time getting my mental and physical health in order, so I can keep doing everything I love for a long time to come.
“I’m so incredibly sorry to everyone who had planned to come to a show before the end of the year but I need to feel well to perform at the standard you all deserve.
“Playing for you every night is all I’ve ever dreamed of so this has been the most difficult decision of my life.
“I’ll be back as soon as I possibly can.”
Here’s wishing Lewis a fast and easy recovery.