The 30-year-old has had trouble with his vocal cords previously, cancelling his 2019 tour when he had laryngitis and was concerned he could haemorrhage one of them.
“I’ve done everything by the book this tour living like a monk, it’s so unlucky,” he wrote on Instagram.
“This has been the best tour so far and all I want to do is get up and sing again for you all tonight.
“I’m so, so sorry to all of you who are on your way tonight.”
Fender added he and his team were trying to find a way to reschedule the dates.
