You cannot separate 'physical' and 'mental' illness, or 'physical' illness and 'emotional' trauma. Had there not been a Dark Ages need to appease the Church, then this mind-body dualism would not exist.
It's as nonsensical as having a split between 'liver illness' and the rest of the body.
Every thought and emotion you have is mediated by neurotransmitters and hormones - the brain is a huge excretory organ. So to believe that these do not affect your body is unscientific.
So for example, inflammatory bowel diseases are known to be related to alterations on the hypothalamus-pituitary-adrenal axis - and that is stress-mediator involvement right there.
When it comes to 'trauma' - rmemebr that children can be traumatised by things that an adult would not find traumatic, and indeed will often accept as perfectly normal. Neglectful parenting, physical punishment etc.
Not to mention possible epigenetic inheritance of trauma, which whilst not 100 per cent proven has an increasing body of evidence around it, particularly in mammals.
The biggest tragedy of this historical mind-body dualism is that people feel that to suggest an emotional/mind component to disease is to make it 'all in the mind' and thus somehow 'lesser'.
This is the last remaining 'mental health' taboo and stigma - that 'physical illness' exists with no 'mental health' component and that to suggest otherwise is an insult. Thus stigmatising using useful therapies