In September, the Forget Me singer announced his Tourettes Syndrome (TS) diagnosis and admitted that he had gone public with it because he didn’t want his tics to be misinterpreted for drug use.

Tourette’s syndrome is a neurological condition that causes a person to make involuntary sounds and movements called tics.

At the time, the BRIT award winner said he was being treated with Botox injections to freeze his muscles to try to control his tics which are triggered by extreme emotions such as excitement or stress.

In recent days a clip from one of the Before You Go hitmaker’s recent gigs has gone viral on TikTok, and left fans worried about the star due to the number of twitches he was showing onstage.

Now addressing the video and his followers’ concerns on the social media site, the Scottish hitmaker said: “Hello it’s Lewis here.

TODO: define component type tiktok

“I’ve seen this video here doing the rounds on TikTok and I see a lot of people in the comments concerned because I’m twitching quite a lot.”

He continued: “I’m doing this quite a lot and look a bit uncomfortable. I’ve got Tourette’s so I’m just twitching quite a bit but it’s not an issue in the slightest. I’m absolutely fine.

“It’s just that this happens when I get tired, nervous, excited or whatever so it just gets more intense.

“I’m not doing it now at all because I’m lying in my bed in my pants but this [the original video] is at the end of an hour and a half gig and I’m singing in front of 15,000 people.

“So I’m tired and I’m very excited because this whole arena is singing my songs back to me but I’m fine.

“Thanks to everyone who came to the gig that night. It was incredible.”

In the UK, more than 300,000 children and adults live with Tourette’s, according to charity Tourette’s Action.