Austrian Eurovision winner Conchita Wurst revealed in an Instagram post on Sunday that he had been receiving treatment for HIV for several years.

The 29-year-old singer said he had not intended to make the diagnosis public, but had been forced to do so because of threats from a former boyfriend.

“I have been HIV positive for many years,” Wurst wrote on Instagram. “This is actually irrelevant to the public, but an ex-boyfriend has threatened to take this private information public and I will never give anyone the right to frighten me and influence my life because of it.”