Tom Parker has travelled to Spain for specialist treatment in his continuing battle against an incurable brain tumour.
The 33-year-old was given the news that he had a stage four tumour in July 2020 - a condition that typically has a prognosis of 12 to 18 months - but he has defied expectations, responding positively to treatment.
Later this week Parker begins a reunion tour with The Wanted - and according to The Sun, he has been receiving private treatment to make sure he is fit enough to cope with the gigs over the coming weeks.
"Tom has been vocal that he doesn't think the options available in Britain are perfect so he's trying elsewhere," a source told the newspaper.
"The tour means so much to him, he cannot wait. The cancer treatment he goes through takes it out of him so it's been good to go abroad and relax."
Parker's treatment is believed to include time in an oxygen machine, massages and a customised diet.
The Wanted's tour begins this Thursday in Glasgow.