I believe that a lot of my physical history includes various things that might easily fall into the conversion category.
As a child, I fainted, usually unexpectedly and without reason.
I rarely caught colds or other sorts of normal mild ordinary childhood infections, because as I understand it now the constant internal and unrecognized “fight or flight” responses I was living with kept my immune system on high alert. Perfect attendance at school, that was me.
I suffered from endometriosis, a physical disease which Dr Gabor Mate links to early trauma and which my own non-psychological medical surgeon said was likely caused due to problems in in-utero development. Maybe from the “hatred” hormones coursing through my mother while she carried me?
Prior to entering therapy, it was not uncommon for me to fall and/or twist an ankle if I unexpectedly hit uneven ground or had a misstep. My SE therapist somehow fixed that, by helping my brain and nervous system grow more integrated and less dissociated.
I experienced chest pain severe enough to send me to the hospital overnight for heart attack testing, but the diagnosis was anxiety. I had no awareness of being in any way anxious when it happened. Mood-wise I was fine, I thought.
So I believe that conversion symptoms happen and they are real symptoms, even if their base source is trauma.