Synaesthesia and mental health

Synaesthesia is broadly acknowledged to be a benign or even positive condition, but in some cases it crosses into the realm of sensory processing disorder. Along with its established association with autistic spectrum condition, synaesthesia has latterly been connected with post-traumatic stress disorder. A better understanding of how synaesthesia manifests and how it might have an impact on PTSD could help to explain why existing conventional PTSD therapies might be less effective for people who experience certain synaesthetic manifestations.