“…Chronic pain and chronic pain disorders are often comorbid with psychiatric and neurodevelopmental disorders (Gureje et al, 2008). This has been observed for Major Depressive Disorder (MDD) (Nicholl et al, 2014;McIntosh et al, 2016), post-traumatic stress-disorder (PTSD) (Shipherd et al, 2007;Dunn et al, 2011;Phifer et al, 2011;Outcalt et al, 2015;Akhtar et al, 2018), schizophrenia (Watson, Chandarana and Merskey, 1981;de Almeida et al, 2013;Engels et al, 2014) and bipolar disorder (BD) (Nicholl et al, 2014;Stubbs et al, 2015). There are also reported differences in the perception of pain and interoception (sensing and integration of bodily signals) for people with schizophrenia (Lévesque et al, 2012;Urban-Kowalczyk, Pigońska and Śmigielski, 2015), anorexia nervosa (AN) (Strigo et al, 2013;Bär et al, 2015;Bischoff-Grethe et al, 2018) and autism spectrum disorders (ASD) (Clarke, 2015;Gu et al, 2018), with some evidence of an increase in pain thresholds for AN and ASD.…”