Dr Monasterio has been a forensic psychiatrist for more than two decades.

I also did two years training in consultation-liaison psychiatry, which considers the interface between physical illnesses and medical illnesses, and examines the behavior of people who have serious medical conditions, and also seeks to understand when people who present with unusual physical symptoms, whether that may be the manifestation of an underlying mental disorder or psychiatric condition.

He says this is one of the big challenges in medicine because pain is not as black and white as we think.

We all like to think that medicine is, you know, a sci- scientifically exact science.

Well, it isn't.

There's very strong scientific underpinnings, but often diagnoses are made relying on the clinical judgment of the doctor making the diagnosis.

There can be huge dispute between people as to whether the diagnosis has been met or not.

So it's unsurprising that occurs.