How can one be 100% sure that one has TMS and accept the diagnosis? It could always be possible that there is some kind of physical explanation. For instance, some people get fibromyalgia because of some reactions to food, or implants, or some other environmental factors. Even if doctors can't find an explanation for the symptoms and one thinks that TMS could be a likely explanation, one can never be 100% sure. Given that acceptance of the diagnosis is essential, this seems to me somewhat problematic.