The UN faces fresh criticism over revelations that a second member of its transgender health panel has a controversial track record — including X-rated Grindr hookup posts and extreme views on trans children.

The UN's World Health Organization (WHO) has been dogged by criticism since it last month unveiled the members of its 20-expert panel tasked with setting global health guidelines for trans and non-binary people.

Critics say the group — which is made up of trans campaigners and advocates — is biased. One trans activist member has already left the panel amid revelations about their past support for a 'default' use of puberty blockers on kids.

Now DailyMail.com can reveal that another panelist — Cianán Russell, a bearded, female-born, non-binary human rights lawyer — has a colorful social media profile that many would see as too smutty for intergovernmental work.

Russell, a Brussels-based staffer with ILGA-Europe, a major LGBTQ+ organization, frequently posts about their bizarre and explicit interactions with suitors on the dating and hookup app Grindr.

The buff, tattooed activist also tweets angrily about the trans 'genocide', and reposts some of the community's most ardent influencers, including Katy Montgomerie, Erin Reed and Montana state representative Zooey Zephyr.