"Mr Assange’s mental health is highly likely to deteriorate over time if he remains in his current situation. Such highly stressful circumstances, with no end in sight, can lead to unpredictable and sometimes very destructive consequences for individuals," the psycho-social and medical assessment said.
According to the report, people suffering from external conditions similar to that of Assange "may become very ill mentally and physically and carry out desperate acts to try and gain relief."
The report called to urgently resolve the current circumstances of Assange’s living conditions and to at least allow for a prescribed dental surgery to be performed on him.
"He lives in a state of chronic health insecurity," the report said.
Assange has been residing at the Ecuadorian Embassy in London since 2012 for fear of being extradited to Sweden where he has been accused of rape.
He denies the allegations, claiming they are a ruse organized by Washington to hand him over to the United States where he is wanted for leaking thousands of top-secret military documents.
In February, the UN Working Group on Arbitrary Detention (WGAD), ruled that Assange's de facto incarceration was arbitrary. The whistleblower lodged an appeal with a Swedish court on August 9, calling on the country to comply with the UN ruling.